It remains to trace briefly the movement of scientific and speculative thought which constituted the transition between the Scholastic and the modern philosophy. It may be compendiously noted under the names of Copernicus, Bruno, Vanini, Galileo, Ramus, Gassendi, Bacon, and Descartes.

The great performance of Copernicus (Nicolaus Koppernigk, 1473–1543), given to the world with an editor’s treacherous preface as he lay paralysed on his deathbed, did not become a general possession for over a hundred years. The long reluctance of its author to let it be published, despite the express invitation of a cardinal in the name of the pope, was well founded in his knowledge of the strength of common prejudice; and perhaps partly in a sense of the scientific imperfection of his own case.183 Only the special favour accorded to his first sketch at Rome—a favour which he had further carefully planned for in his dedicatory epistle to Pope Paul—saved his main treatise from prohibition till long after its work was done.184 It was in fact, with all its burden of traditional error, the most momentous challenge that had yet been offered in the modern world to established beliefs, alike theological and lay, for it seemed to flout “common sense” as completely as it did the cosmogony of the sacred books. It was probably from scraps of ancient lore current in Italy in his years of youthful study there that he first derived his idea; and in Italy none had dared publicly to propound the geocentric theory. Its gradual victory, therefore, is the first great modern instance of a triumph of reason over spontaneous and instilled prejudice; and Galileo’s account of his reception of it should be a classic document in the history of rationalism.

It was when he was a student in his teens that there came to Pisa one Christianus Urstitius of Rostock, a follower of Copernicus, to lecture on the new doctrine. The young Galileo, being satisfied that “that opinion could be no other than a solemn madness,” did not attend; and those of his acquaintance who did made a jest of the matter, all save one, “very intelligent and wary,” who told him that “the business was not altogether to be laughed at.” Thenceforth he began to inquire of Copernicans, with the result inevitable to such a mind as his. “Of as many as I examined I found not so much as one who told me not that he had been a long time of the contrary opinion, but to have changed it for this, as convinced by the strength of the reasons proving the same; and afterwards questioning them one by one, to see whether they were well possessed of the reasons of the other side, I found them all to be very ready and perfect in them, so that I could not truly say that they took this opinion out of ignorance, vanity, or to show the acuteness of their wits.” On the other hand, the opposing Aristoteleans and Ptolemeans had seldom even superficially studied the Copernican system, and had in no case been converted from it. “Whereupon, considering that there was no man who followed the opinion of Copernicus that had not been first on the contrary side, and that was not very well acquainted with the reasons of Aristotle and Ptolemy, while, on the contrary, there was not one of the followers of Ptolemy that had ever been of the judgment of Copernicus, and had left that to embrace this of Aristotle,” he began to realize how strong must be the reasons that thus drew men away from beliefs “imbibed with their milk.”185 We can divine how slow would be the progress of a doctrine which could only thus begin to find its way into one of the most gifted scientific minds of the modern world. It was only a minority of the élite of the intellectual life who could receive it, even after the lapse of a hundred years.

One of the first to bring the new cosmological conception to bear on philosophic thought was Giordano Bruno of Nola (1548–1600), whose life and death of lonely chivalry have won him his place as the typical martyr of modern freethought.186 He may be conceived as a blending of the pantheistic and naturalistic lore of ancient Greece,187 assimilated through the Florentine Platonists, with the spirit of modern science (itself a revival of the Greek) as it first takes firm form in Copernicus, whose doctrine Bruno early and ardently embraced. Baptized Filippo, he took Giordano as his cloister-name when he entered the great convent of S. Domenico Maggiore at Naples in 1563, in his fifteenth year. No human being was ever more unfitly placed among the Dominicans, punningly named the “hounds of the Lord” (domini canes) for their work as the corps of the Inquisition; and very early in his cloister life he came near being formally proceeded against for showing disregard of sacred images, and making light of the sanctity of the Virgin.188 He passed his novitiate, however, without further trouble, and was fully ordained a priest in 1572, in his twenty-fourth year. Passing then through several Neapolitan monasteries during a period of three years, he seems to have become not a little of a freethinker on his return to his first cloister, as he had already reached Arian opinions in regard to Christ, and soon proceeded to substitute a mystical and Pythagorean for the orthodox view of the Trinity.189

For the second time a “process” was begun against him, and he took flight to Rome (1576), presenting himself at a convent of his Order. News speedily came from Naples of the process against him, and of the discovery that he had possessed a volume of the works of Chrysostom and Jerome with the scholia of Erasmus—a prohibited thing. Only a few months before Bartolomeo Carranza, Bishop of Toledo, who had won the praise of the Council of Trent for his index of prohibited books, had been condemned to abjure for the doctrine that “the worship of the relics of the saints is of human institution,” and had died in the same year at the convent to which Bruno had now gone. Thus doubly warned, he threw off his priestly habit, and fled to the Genoese territory,190 where, in the commune of Noli, he taught grammar and astronomy. In 1578 he visited successively Turin, Venice, Padua, Bergamo, and Milan, resuming at the last-named town his monk’s habit. Thereafter he again returned to Turin, passing thence to Chambéry at the end of 1578, and thence to Geneva early in 1579.191 His wish, he said, was “to live in liberty and security”; but for that he must first renounce his Dominican habit; other Italian refugees, of whom there were many at Geneva, helping him to a layman’s suit. Becoming a corrector of the press, he seems to have conformed externally to Calvinism; but after a stay of two and a-half months he published a short diatribe against one Antonio de La Faye, who professed philosophy at the Academy; and for this he was arrested and sentenced to excommunication, while his bookseller was subjected to one day’s imprisonment and a fine.192 After three weeks the excommunication was raised; but he nevertheless left Geneva, and afterwards spoke of Calvinism as the “deformed religion.” After a few weeks’ sojourn at Lyons he went to Toulouse, the very centre of inquisitional orthodoxy; and there, strangely enough, he was able to stay for more than a year,193 taking his degree as Master of Arts and becoming professor of astronomy. But the civil wars made Toulouse unsafe; and at length, probably in 1581 or 1582, he reached Paris, where for a time he lectured as professor extraordinary.194 In 1583 he reached England, where he remained till 1585, lecturing, debating at Oxford on the Copernican theory, and publishing a number of his works, four of them dedicated to his patron Castelnau de Mauvissière, the French ambassador. Oxford was then a stronghold of bigoted Aristotelianism, where bachelors and masters deviating from the master were fined, or, if openly hostile, expelled.195 In that camp Bruno was not welcome. But he had other shelter, at the French Embassy in London, and there he had notable acquaintances. He had met Sir Philip Sidney at Milan in 1578; and his dialogue, Cena de le Ceneri, gives a vivid account of a discussion in which he took a leading part at a banquet given by Sir Fulke Greville. His picture of “Oxford ignorance and English ill-manners”196 is not lenient; and there is no reason to suppose that his doctrine was then assimilated by many;197 but his stay in the household of Castelnau was one of the happiest periods of his chequered life. While in England he wrote no fewer than seven works, four of them dedicated to Castelnau, and two—the Heroic Fervours and the Expulsion of the Triumphant Beast—to Sir Philip Sidney.

Returning to Paris on the recall of Castelnau in 1585, he made an attempt to reconcile himself to the Church, but it was fruitless; and thereafter he went his own way. After a public disputation at the university in 1586, he set out on a new peregrination, visiting first Mayence, Marburg, and Wittemberg. At Marburg he was refused leave to debate; and at Wittemberg he seems to have been carefully conciliatory, as he not only matriculated but taught for over a year (1586–1588), till the Calvinist party carried the day over the Lutheran.198 Thereafter he reached Prague, Helmstadt, Frankfort, and Zurich. At length, on the fatal invitation of the Venetian youth Mocenigo, he re-entered Italian territory, where, in Venice, he was betrayed to the Inquisition by his treacherous and worthless pupil.199

What had been done for freethought by Bruno in his fourteen years of wandering, debating, and teaching through Europe it is impossible to estimate; but it is safe to say that he was one of the most powerful antagonists to orthodox unreason that had yet appeared. Of all men of his time he had perhaps the least affinity with the Christian creed, which was repellent to him alike in the Catholic and the Protestant versions. The attempt to prove him a believer on the strength of a non-autograph manuscript200 is idle. His approbation of a religion for the discipline of uncivilized peoples is put in terms of unbelief.201 In the Spaccio della bestia trionfante he derides the notion of a union of divine and human natures, and substantially proclaims a natural (theistic) religion, negating all “revealed” religions alike. Where Boccaccio had accredited all the three leading religions, Bruno disallows all with paganism, though he puts that above Christianity.202 And his disbelief grew more stringent with his years. Among the heretical propositions charged against him by the Inquisition were these: that there is transmigration of souls; that magic is right and proper; that the Holy Spirit is the same thing as the soul of the world; that the world is eternal; that Moses, like the Egyptians, wrought miracles by magic; that the sacred writings are but a romance (sogno); that the devil will be saved; that only the Hebrews are descended from Adam, other men having descended from progenitors created by God before Adam; that Christ was not God, but was a notorious sorcerer (insigne mago), who, having deceived men, was deservedly hanged, not crucified; that the prophets and the apostles were bad men and sorcerers, and that many of them were hanged as such. The cruder of these propositions rest solely on the allegation of Mocenigo, and were warmly repudiated by Bruno: others are professedly drawn, always, of course, by forcing his language, but not without some colourable pretext, from his two “poems,” De triplice, minimo, et mensura, and De monade, numero et figura, published at Frankfort in 1591, in the last year of his freedom.203 But the allusions in the Sigillus Sigillorum204 to the weeping worship of a suffering Adonis, to the exhibition of suffering and miserable Gods, to transpierced divinities, and to sham miracles, were certainly intended to contemn the Christian system.

Alike in the details of his propaganda and in the temper of his utterance, Bruno expresses from first to last the spirit of freethought and free speech. Libertas philosophica205 is the breath of his nostrils; and by his life and his death alike he upholds the ideal for men as no other before him did. The wariness of Rabelais and the non-committal skepticism of Montaigne are alike alien to him; he is too lacking in reticence, too explosive, to give due heed even to the common-sense amenities of life, much more to hedge his meaning with safeguarding qualifications. And it was doubtless as much by the contagion of his mood as by his lore that he impressed men.

His personal and literary influence was probably most powerful in respect of his eager propaganda of the Copernican doctrine, which he of his own force vitally expanded and made part of a pantheistic conception of the universe.206 Where Copernicus adhered by implication to the idea of an external and limitary sphere—the last of the eight of the Ptolemaic theory—Bruno reverted boldly to the doctrine of Anaximandros, and declared firmly for the infinity of space and of the series of the worlds. In regard to biology he makes an equivalent advance, starting from the thought of Empedocles and Lucretius, and substituting an idea of natural selection for that of creative providence.207 The conception is definitely thought out, and marks him as one of the renovators of scientific no less than of philosophic thought for the modern world; though the special paralysis of science under Christian theology kept his ideas on this side pretty much a dead letter for his own day. And indeed it was to the universal and not the particular that his thought chiefly and most enthusiastically turned. A philosophic poet rather than a philosopher or man of science, he yet set abroad for the modern world that conception of the physical infinity of the universe which, once psychologically assimilated, makes an end of the medieval theory of things. On this head he was eagerly affirmative; and the merely Pyrrhonic skeptics he assailed as he did the “asinine” orthodox, though he insisted on doubt as the beginning of wisdom.

Of his extensive literary output not much is stamped with lasting scientific fitness or literary charm; and some of his treatises, as those on mnemonics, have no more value than the product of his didactic model, Raymond Lully. As a writer he is at his best in the sweeping expatiation of his more general philosophic treatises, where he attains a lifting ardour of inspiration, a fervour of soaring outlook, that puts him in the front rank of the thinkers of his age. And if his literary character is at times open to severe criticism in respect of his lack of balance, sobriety, and self-command, his final courage atones for such shortcomings.

His case, indeed, serves to remind us that at certain junctures it is only the unbalanced types that aid humanity’s advance. The perfectly prudent and self-sufficing man does not achieve revolutions, does not revolt against tyrannies; he wisely adapts himself and subsists, letting the evil prevail as it may. It is the more impatient and unreticent, the eager and hot-brained—in a word, the faulty—who clash with oppression and break a way for quieter spirits through the hedges of enthroned authority. The serenely contemplative spirit is rather a possession than a possessor for his fellows; he may inform and enlighten, but is not in himself a countering or inspiriting force: a Shelley avails more than a Goethe against tyrannous power. And it may be that the battling enthusiast in his own way wins liberation for himself from “fear of fortune and death,” as he wins for others liberty of action.208 Even such a liberator, bearing other men’s griefs and taking stripes that they might be kept whole, was Bruno.

And though he quailed at the first shock of capture and torture, when the end came he vindicated human nature as worthily as could any quietist. It was a long-drawn test. Charged on the traitor’s testimony with many “blasphemies,” he denied them all,209 but stood to his published writings210 and vividly expounded his theories,211 professing in the usual manner to believe in conformity with the Church’s teachings, whatever he might write on philosophy. It is impossible to trust the Inquisition records as to his words of self-humiliation;212 though on the other hand no blame can rationally attach to anyone who, in his place, should try to deceive such enemies, morally on a level with hostile savages. It is certain that the Inquisitors frequently wrung recantations by torture.213

What is historically certain is that Bruno was not released, but sent on to Rome, and was kept there in prison for seven years. He was not the sort of heretic likely to be released; though the fact of his being a Dominican, and the desire to maintain the Church’s intellectual credit, delayed so long his execution. Certainly not an atheist (he called himself in several of his book-titles Philotheus; he consigns insano ateismo to perdition;214 and his quasi-pantheism or monism often lapses into theistic modes),215 he yet was from first to last essentially though not professedly anti-Christian in his view of the universe. If the Church had cause to fear any philosophic teaching, it was his, preached with the ardour of a prophet and the eloquence of a poet. His doctrine that the worlds in space are innumerable was as offensive to orthodox ears as his specific negations of Christian dogma, outgoing as it did the later idea of Kepler and Galileo. He had, moreover, finally refused to make any fresh recantation; and the only detailed document extant concerning his final trial describes him as saying to his judges: “With more fear, perchance, do you pass sentence on me than I receive it.”216 According to all accessible records, he was burned alive at Rome in February, 1600, in the Field of Flowers, near where his statue now stands. As was probably customary, they tied his tongue before leading him to the stake, lest he should speak to the people;217 and his martyrdom was an edifying spectacle for the vast multitude of pilgrims who had come from all parts of Christendom for the jubilee of the pope.218 At the stake, when he was at the point of death, there was duly presented to him the crucifix, and he duly put it aside.

Bruno has been zealously blackened by Catholic writers for the obscenity of some of his writing219 and the alleged freedom of his life—piquant charges, when we remember the life of the Papal Italy in which he was born. Lucilio Vanini (otherwise Julius Cæsar Vanini), the next martyr of freethought, also an Italian (b. at Taurisano, 1585), is open to the more relevant charges of an inordinate vanity and some duplicity. Figuring as a Carmelite friar, which he was not, he came to England (1612) and deceitfully professed to abjure Catholicism,220 gaining, however, nothing by the step, and contriving to be reconciled to the Church, after being imprisoned for forty-nine days on an unrecorded charge. Previously he had figured, like Bruno, as a wandering scholar at Amsterdam, Brussels, Cologne, Geneva, and Lyons; and afterwards he taught natural philosophy for a year at Genoa. His treatise, Amphitheatrum Æterna Providentiæ (Lyons, 1615), is professedly directed against “ancient philosophers, Atheists, Epicureans, Peripatetics, and Stoics,” and is ostensibly quite orthodox.221 In one passage he untruthfully tells how, when imprisoned in England, he burned with the desire to shed his blood for the Catholic Church.222 In another, after declaring that some Christian doctors have argued very weakly against the Epicureans on immortality, he avows that he, “Christianus nomine cognomine Catholicus,” could hardly have held the doctrine if he had not learned it from the Church, “the most certain and infallible mistress of truth.”223 As usual, the attack leaves us in doubt as to the amount of real atheism current at the time. The preface asserts that “Ἀθεότητο autem secta pestilentissima quotidie, latius et latius vires acquirit eundo,” and there are various hostile allusions to atheists in the text;224 but the arguments cited from them are such as might be brought by deists against miracles and the Christian doctrine of sin; and there is an allusion of the customary kind to “Nicolaus Machiavellus Atheorum facile princeps,”225 which puts all in doubt. The later published Dialogues, De Admirandis Naturæ Arcanis,226 while showing a freer critical spirit, would seem to be in part earlier in composition, if we can trust the printer’s preface, which represents them as collected from various quarters, and published only with the reluctant consent of the author.227 This, of course, may be a mystification; in any case the Dialogues twice mention the Amphitheatrum; and the fourth book, in which this mention occurs, may be taken on this and other grounds to set forth his later ideas. Even the Dialogues, however, while discussing many questions of creed and science in a free fashion, no less profess orthodoxy; and, while one passage is pantheistic,228 they also denounce atheism.229 And whereas one passage does avow that the author in his Amphitheatrum had said many things he did not believe, the context clearly suggests that the reference was not to the main argument, but to some of its dubious facts.230 In any case, though the title—chosen by the editors—speaks daringly enough of “Nature, the queen and goddess of mortals,” Vanini cannot be shown to be an atheist;231 and the attacks upon him as an immoral writer are not any better supported.232 The publication of the dialogues was in fact formally authorized by the Sorbonne,233 and it does not even appear that when he was charged with atheism and blasphemy at Toulouse that work was founded on, save in respect of its title.234 The charges rested on the testimony of a treacherous associate as to his private conversation; and, if true, it only amounted to proving his pantheism, expressed in his use of the word “Nature.” At his trial he expressly avowed and argued for theism. The judges, by one account, did not agree. Yet he was convicted, by the voices of the majority, and burned alive (February 9, 1619) on the day of his sentence. Drawn on a hurdle, in his shirt, with a placard on his shoulders inscribed “Atheist and Blasphemer of the name of God,” he went to his death with a high heart, rejoicing, as he cried in Italian, to die like a philosopher.235 A Catholic historian,236 who was present, says he hardily declared that “Jesus facing death sweated with fear: I die undaunted.” But before burning him they tore out his tongue by the roots; and the Christian historian is humorous over the victim’s long cry of agony.237 No martyr ever faced death with a more dauntless courage than this

and if the man had all the faults falsely imputed to him,239 his death might shame his accusers.

Vanini, like Bruno, can now be recognized and understood as an Italian of vivacious temperament, studious without the student’s calm, early learned, alert in debate, fluent, imprudent, and ill-balanced. By his own account he studied theology under the Carmelite Bartolomeo Argotti, phoenix of the preachers of the time;240 but from the English Carmelite, John Bacon, “the prince of Averroïsts,”241 he declares, he “learned to swear only by Averroës”; and of Pomponazzi he speaks as his master, and as “prince of the philosophers of our age.”242 He has criticized both freely in his Amphitheatrum; but whereas that work is a professed vindication of orthodoxy, we may infer from the De Arcanis that the arguments of these skeptics, like those of the contemporary atheists whom he had met in his travels, had kept their hold on his thought even while he controverted them. For it cannot be disputed that the long passages which he quotes from the “atheist at Amsterdam”243 are put with a zest and cogency which are not infused into the professed rebuttals, and are in themselves quite enough to arouse the anger and suspicion of a pious reader. A writer who set forth so fully the acute arguments of unbelievers, unprintable by their authors, might well be suspected of writing at Christianity when he confuted the creeds of the pagans. As was noted later of Fontenelle, he put arguments against oracles which endangered prophecy; his dismissal of sorcery as the dream of troubled brains appeals to reason and not to faith; and his disparagement of pagan miracles logically bore upon the Christian.

When he comes to the question of immortality he grows overtly irreverent. Asked by the interlocutor in the last dialogue to give his views on the immortality of the soul, he begs to be excused, protesting: “I have vowed to my God that that question shall not be handled by me till I become old, rich, and a German.” And without overt irreverence he is ever and again unserious. Perfectly transparent is the irony of the appeal, “Let us give faith to the prescripts of the Church, and due honour to the sacrosanct Gregorian apparitions,”244 and the protestation, “I will not invalidate the powers of holy water, to which Alexander, Doctor and Pontifex of the Christians, and interpreter of the divine will, accorded such countless privileges.”245 And even in the Amphitheatrum, with all the parade of defending the faith, there is a plain balance of cogency on the side of the case for the attack,246 and a notable disposition to rely finally on lines of argument to which faith could never give real welcome. The writer’s mind, it is clear, was familiar with doubt. In the malice of orthodoxy there is sometimes an instinctive perception of hostility; and though Vanini had written, among other things,247 an Apologia pro lege mosaïcâ et christianâ, to which he often refers, and an Apologia pro concilio Tridentino, he can be seen even in the hymn to deity with which he concludes his Amphitheatrum to have no part in evangelical Christianity.

He was in fact a deist with the inevitable leaning of the philosophic theist to pantheism; and whatever he may have said to arouse priestly hatred at Toulouse, he was rather less of an atheist than Spinoza or Bruno or John Scotus. On his trial,248 pressed as to his real beliefs by judges who had doubtless challenged his identification of God with Nature, he passed from a profession of orthodox faith in a trinity into a flowing discourse which could as well have availed for a vindication of pantheism as for the proposition of a personal God. Seeing a straw on the ground, he picked it up and talked of its history; and when brought back again from his affirmation of Deity to his doctrine of Nature, he set forth the familiar orthodox theorem that, while Nature wrought the succession of seeds and fruits, there must have been a first seed which was created. It was the habitual standing ground of theism; and they burned him all the same. It remains an open question whether personal enmity on the part of the prosecuting official249 or a real belief that he had uttered blasphemies against Jesus or Mary was the determining force, or whether even less motive sufficed. A vituperative Jesuit of that age sees intolerable freethinking in his suggestion of the unreality of demoniacal possession and the futility of exorcisms.250 And for that much they were not incapable of burning men in Catholic Toulouse in the days of Mary de Medici.

There are in fact reasons for surmizing that in the cases alike of Bruno and of Vanini it was the attitude of the speculator towards scientific problems that primarily or mainly aroused distrust and anger among the theologians. Vanini is careful to speak equivocally of the eternity of the universe; and though he makes a passing mention of Kepler,251 he does not name Copernicus. He had learned something from the fate of Bruno. Yet in the Dialogue De cœli forma et motore252 he declares so explicitly for a naturalistic explanation of the movements of the heavenly bodies that he must have aroused in some orthodox readers such anger as was set up in Plato by a physical theory of sun and stars. After an à priori discussion on Aristotelian lines, the querist in the dialogue asks what may fitly be held, with an eye to religion, concerning the movements of the spheres. “This,” answers Vanini, “unless I am in error: the mass of the heaven is moved in its proper gyratory way by the nature of its elements.” “How then,” asks the querist, “are the heavens moved by certain and fixed laws, unless divine minds, participating in the primal motion, there operate?” “Where is the wonder?” returns Vanini. “Does not a certain and fixed law of motion act in the most paltry clockwork machines, made by a drunken German, even as there works silently in a tertian and quartan fever a motion which comes and goes at fixed periods without transgressing its line by a moment? The sea also at certain and fixed times, by its nature, as you peripatetics affirm, is moved in progressions and regressions. No less, then, I affirm the heaven to be forever carried by the same motion in virtue of its nature (a sua pura forma) and not to be moved by the will of intelligence.” And the disciple assents. Kepler had seen fit, either in sincerity or of prudence, to leave “divine minds” in the planets; and Vanini’s negation, though not accompanied by any assertion of the motion of the earth, was enough to provoke the minds which had only three years before put Copernicus on the Index, and challenged Galileo for venting his doctrine.

It is at this stage that we begin to realize the full play of the Counter-Reformation, as against the spirit of science. The movement of mere theological and ecclesiastical heresy had visibly begun to recede in the world of mind, and in its stead, alike in Protestant and in Catholic lands, there was emerging a new activity of scientific research, vaguely menacing to all theistic faith. Kepler represented it in Germany, Harriott and Harvey and Gilbert and Bacon in England; from Italy had come of late the portents of Bruno and Galileo; even Spain yielded the Examen de Ingenios of Huarte (1575), where with due protestation of theism the physicist insists upon natural causation; and now Vanini was exhibiting the same incorrigible zest for a naturalistic explanation of all things. His dialogues are full of such questionings; the mere metaphysic and theosophy of the Amphitheatrum are being superseded by discussions on physical and physiological phenomena. It was for this, doubtless, that the De Arcanis won the special vogue over which the Jesuit Garasse was angrily exclaiming ten years later.253 Not merely the doubts cast upon sorcery and diabolical possession, but the whole drift, often enough erratic, of the inquiry as to how things in nature came about, caught the curiosity of the time, soon to be stimulated by more potent and better-governed minds than that of the ill-starred Vanini. And for every new inquirer there would be a hostile zealot in the Church, where the anti-intellectual instinct was now so much more potent than it had been in the days before Luther, when heresy was diagnosed only as a danger to revenue.

It was with Galileo that there began the practical application of the Copernican theory to astronomy, and, indeed, the decisive demonstration of its truth. With him, accordingly, began the positive rejection of the Copernican theory by the Church; for thus far it had never been officially vetoed—having indeed been generally treated as a wild absurdity. Almost immediately after the publication of Galileo’s Sidereus Nuncius (1610) his name is found in the papers of the Inquisition, with that of Cremonini of Padua, as a subject of investigation.254 The juxtaposition is noteworthy. Cremonini was an Aristotelian, with Averroïst leanings, and reputed an atheist;255 and it was presumably on this score that the Inquisition was looking into his case. At the same time, as an Aristotelian he was strongly opposed to Galileo, and is said to have been one of those who refused to look through Galileo’s telescope.256 Galileo, on the other hand, was ostensibly a good Catholic; but his discovery of the moons of Jupiter was a signal confirmation of the Copernican theory, and the new status at once given to that made a corresponding commotion in the Church. Thus he had against him both the unbelieving pedants of the schools and the typical priests.

In his book the great discoverer had said nothing explicitly on the subject of the Copernican theory; but in lectures and conversations he had freely avowed his belief in it; and the implications of the published treatise were clear to all thinkers.257 And though, when he visited Rome in 1611, he was well received by Pope Paul V, and his discoveries were favourably reported of by the four scientific experts nominated at the request of Cardinal Bellarmin to examine them,258 it only needed that the Biblical cry should be raised to change the situation. The Church still contained men individually open to new scientific ideas; but she was then more than ever dominated by the forces of tradition; and as soon as those forces had been practically evoked his prosecution was bound to follow. The cry of “religion in danger” silenced the saner men at Rome.

The fashion in which Galileo’s sidereal discoveries were met is indeed typical of the whole history of freethought. The clergy pointed to the story of Joshua stopping the sun and moon; the average layman scouted the new theory as plain folly; and typical schoolmen insisted that “the heavens are unchangeable,” and that there was no authority in Aristotle for the new assertions. With such minds the man of science had to argue, and in deference to such he had at length to affect to doubt his own demonstrations.259 The Catholic Reaction had finally created as bitter a spirit of hostility to free science in the Church as existed among the Protestants; and in Italy even those who saw the moons of Jupiter through his telescope dared not avow what they had seen.260 It was therefore an unfortunate step on Galileo’s part to go from Padua, which was under the rule of Venice, then anti-papal,261 to Tuscany, on the invitation of the Grand Duke. When in 1613 he published his treatise on the solar spots, definitely upholding Copernicus against Jesuits and Aristotelians, trouble became inevitable; and his letter262 to his pupil, Father Castelli, professor of mathematics at Pisa, discussing the Biblical argument with which they had both been met, at once evoked an explosion when circulated by Castelli. New trouble arose when Galileo in 1615 wrote his apology in the form of a letter to his patroness the Dowager Grand Duchess Cristina of Tuscany, extracts from which became current. An outcry of ignorant Dominican monks263 sufficed to set at work the machinery of the Index,264 the first result of which (1616) was to put on the list of condemned books the great treatise of Copernicus, published seventy-three years before. Galileo personally escaped for the present through the friendly intervention of the Pope, Paul V, on the appeal of his patron, the Grand Duke of Tuscany, apparently on the ground that he had not publicly taught the Copernican theory. It would seem as if some of the heads of the Church were at heart Copernicans;265 but they were in any case obliged to disown a doctrine felt by so many others to be subversive of the Church’s authority.

Thus officially “admonished” for his heresy, but not punished, in 1616, Galileo kept silence for some years, till in 1618 he published his (erroneous) theory of the tides, which he sent with an ironical epistle to the friendly Archduke Leopold of Austria, professing to be propounding a mere dream, disallowed by the official veto on Copernicus.266 This, however, did him less harm than his essay Il Saggiatore (“The Scales”), in which he opposed the Jesuit Grassi on the question of comets. Receiving the imprimatur in 1623, it was dedicated to the new pope, Urban VIII, who, as the Cardinal Maffeo Barberini, had been Galileo’s friend. The latter could now hope for freedom of speech, as he had all along had a number of friends at the papal court, besides many priests, among his admirers and disciples. But the enmity of the Jesuits countervailed all. They did not succeed in procuring a censure of the Saggiatore, though that subtly vindicates the Copernican system while professing to hold it disproved by the fiat of the Church;267 but when, venturing further, he after another lapse of years produced his Dialogues on the Two Systems, for which he obtained the papal imprimatur in 1632, they caught him in their net. Having constant access to the pope, they contrived to make him believe that Galileo had ridiculed him in one of the personages of his Dialogues. It was quite false; but one of the pope’s anti-Copernican arguments was there unconsciously made light of; and his wounded vanity was probably a main factor in the impeachment which followed.268 His Holiness professed to have been deceived into granting the imprimatur;269 a Special Commission was set on foot; the proceedings of 1616 were raked up; and Galileo was again summoned to Rome. He was old and frail, and sent medical certificates of his unfitness for such travel; but it was insisted on, and as under the papal tyranny there was no help, he accordingly made the journey. After many delays he was tried, and, on his formal abjuration, sentenced to formal imprisonment (1633) for teaching the “absurd” and “false doctrine” of the motion of the earth and the non-motion of the sun from east to west. In this case the pope, whatever were his motives, acted as a hot anti-Copernican, expressing his personal opinion on the question again and again, and always in an anti-Copernican sense. In both cases, however, the popes, while agreeing to the verdict, abstained from officially ratifying it,270 so that, in proceeding to force Galileo to abjure his doctrine, the Inquisition technically exceeded its powers—a circumstance in which some Catholics appear to find comfort. Seeing that three of the ten cardinals named in the preamble to the sentence did not sign, it has been inferred that they dissented; but there is no good reason to suppose that either the pope or they wilfully abstained from signing. They had gained their point—the humiliation of the great discoverer.

The stories of his being tortured and blinded, and saying “Still it moves,” are indeed myths.271 The broken-spirited old man was in no mood so to speak; he was, moreover, in all respects save his science, an orthodox Catholic,272 and as such not likely to defy the Church to its face. In reality he was formally in the custody of the Inquisition—and this not in a cell, but in the house of an official—for only twenty-two days. After the sentence he was again formally detained for some seventeen days in the Villa Medici, but was then allowed to return to his own rural home at Acatri,273 on condition that he lived in solitude, receiving no visitors. He was thus much more truly a prisoner than the so-called “prisoner of the Vatican” in our own day. The worst part of the sentence, however, was the placing of all his works, published and unpublished, on the Index Expurgatorius, and the gag thus laid on all utterance of rational scientific thought in Italy—an evil of incalculable influence. “The lack of liberty and speculation,” writes a careful Italian student, “was the cause of the death first of the Accademia dei Lincei, an institution unique in its time; then of the Accademia del Cimento. Thus Italy, after the marvellous period of vigorous native civilization in the thirteenth century, after a second period of civilization less native but still its own, as being Latin, saw itself arrested on the threshold of a third and not less splendid period. Vexations and prohibitions expelled courage, spontaneity, and universality from the national mind; literary style became uncertain, indeterminate; and, forbidden to treat of government, science, or religion, turned to things frivolous and fruitless. For the great academies, instituted to renovate and further the study of natural philosophy, were substituted small ones without any such aim. Intellectual energy, the love of research and of objective truth, greatness of feeling and nobility of character, all suffered. Nothing so injures a people as the compulsion to express or conceal its thought solely from motives of fear. The nation in which those conditions were set up became intellectually inferior to those in which it was possible to pass freely in the vast regions of knowledge. Her culture grew restricted, devoid of originality, vaporous, umbratile; there arose habits of servility and dissimulation; great books, great men, great purposes were denaturalized.”274

It was thus in the other countries of Europe that Galileo’s teaching bore its fruit, for he speedily got his condemned Dialogues published in Latin by the Elzevirs; and in 1638, also at the hands of the Elzevirs, appeared his Dialogues of the New Sciences [i.e., of mechanics and motion], the “foundation of mechanical physics.” By this time he was totally blind, and then only, when physicians could not help him save by prolonging his life, was he allowed to live under strict surveillance in Florence, needing a special indulgence from the Inquisition to permit him even to go to church at Easter. The desire of his last blind days, to have with him his best-beloved pupil, Father Castelli, was granted only under rigid limitation and supervision, though even the papacy could not keep from him the plaudits of the thinkers of Europe. Finally he passed away in his rural “prison”—after five years of blindness—in 1642, the year of Newton’s birth. At that time his doctrines were under anathema in Italy, and known elsewhere only to a few. Hobbes in 1634 tried in vain to procure for the Earl of Newcastle a copy of the earlier Dialogues in London, and wrote: “It is not possible to get it for money.... I hear say it is called-in, in Italy, as a book that will do more hurt to their religion than all the books of Luther and Calvin, such opposition they think is between their religion and natural reason.”275 Not till 1757 did the papacy permit other books teaching the Copernican system; in 1765 Galileo was still under ban; not until 1822 was permission given to treat the theory as true; and not until 1835 was the work of Copernicus withdrawn from the Index.276

While modern science was thus being placed on its special basis, a continuous resistance was being made in the schools to the dogmatism which held the mutilated lore of Aristotle as the sum of human wisdom. Like the ecclesiastical revolution, this had been protracted through centuries. Aristotelianism, whether theistic or pantheistic, whether orthodox or heterodox,277 had become a dogmatism like another, a code that vetoed revision, a fetter laid on the mind. Even as a negation of Christian superstition it had become impotent, for the Peripatetics were not only ready to make common cause with the Jesuits against Galileo, as we have seen; some of them were content even to join in the appeal to the Bible.278 The result of such uncritical partisanship was that the immense service of Aristotle to mental life—the comprehensive grasp which gave him his long supremacy as against rival system-makers, and makes him still so much more important than any of the thinkers who in the sixteenth century revolted against him—was by opponents disregarded and denied, though the range and depth of his influence are apparent in all the polemic against him, notably in that of Bacon, who is constantly citing him, and relates his reasoning to him, however antagonistically, at every turn.

Naturally, the less sacrosanct dogmatism was the more freely assailed; and in the sixteenth century the attacks became numerous and vehement. Luther was a furious anti-Aristotelian,279 as were also some Calvinists; but in 1570 we find Beza declaring to Ramus280 that “the Genevese have decreed, once and for ever, that they will never, neither in logic nor in any other branch of learning, turn away from the teaching of Aristotle.” At Oxford the same code held.281 In Italy, Telesio, who notably anticipates the tone of Bacon as to natural science, and is largely followed by him, influenced Bruno in the anti-Aristotelian direction,282 though it was in a long line from Aristotle that he got his principle of the eternity of the universe. The Spaniard Ludovicus Vives, too (1492–1540), pronounced by Lange one of the clearest heads of his age, had insisted on progress beyond Aristotle in the spirit of naturalist science.283 But the typical anti-Aristotelian of the century was Ramus (Pierre de la Ramée, 1515–1572), whose long and strenuous battle against the ruling school at Paris brought him to his death in the Massacre of St. Bartholomew.284 Ramus hardily laid it down that “there is no authority over reason, but reason ought to be queen and ruler over authority.”285 Such a message was of more value than his imperfect attempt to supersede the Aristotelian logic. Bacon, who carried on in England the warfare against the Aristotelian tradition, never ventured so to express himself as against the theological tyranny in particular, though, as we have seen, the general energy and vividness of his argumentation gave him an influence which undermined the orthodoxies to which he professed to conform. On the other hand, he did no such service to exact science as was rendered in his day by Kepler and Galileo and their English emulators; and his full didactic influence came much later into play.

Like fallacies to Bacon’s may be found in Descartes, whose seventeenth-century reputation as a champion of theism proved mainly the eagerness of theists for a plausible defence. Already in his own day his arguments were logically confuted by both Gassendi and Hobbes; and his partial success with theists was a success of partisanism. It was primarily in respect of his habitual appeal to reason and argument, in disregard of the assumptions of faith, and secondarily in respect of his real scientific work, that he counts for freethought. Ultimately his method undermined his creed; and it is not too much to say of him that, next to Copernicus, Kepler, and Galileo,286 he laid a good part of the foundation of modern philosophy and science,287 Gassendi largely aiding. Though he never does justice to Galileo, from his fear of provoking the Church, it can hardly be doubted that he owes to him in large part the early determination of his mind to scientific methods; for it is difficult to believe that the account he gives of his mental development in the Discours de la Méthode (1637) is biographically true. It is rather the schemed statement, by a ripened mind, of how it might best have been developed. Nor did Descartes, any more than Bacon, live up to the intellectual idea he had framed. All through his life he anxiously sought to propitiate the Church;288 and his scientific as well as his philosophic work was hampered in consequence. In England Henry More, who latterly recoiled from his philosophy, still thought his physics had been spoiled by fear of the Church, declaring that the imprisonment of Galileo “frighted Des Cartes into such a distorted description of motion that no man’s reason could make good sense of it, nor modesty permit him to fancy anything nonsense in so excellent an author.”289

But nonetheless the unusual rationalism of Descartes’s method, avowedly aiming at the uprooting of all his own prejudices290 as a first step to truth, displeased the Jesuits, and could not escape the hostile attention of the Protestant theologians of Holland, where Descartes passed so many years of his life. Despite his constant theism, accordingly, he had at length to withdraw.291 A Jesuit, Père Bourdin, sought to have the Discours de la Méthode at once condemned by the French clergy, but the attempt failed for the time being. France was just then, in fact, the most freethinking part of Europe;292 and Descartes, though not so unsparing with his prejudices as he set out to be, was the greatest innovator in philosophy that had arisen in the Christian era. He made real scientific discoveries, too, where Bacon only inspired an approach and schemed a wandering road to them. He first effectively applied algebra to geometry; he first scientifically explained the rainbow; he at once accepted and founded on Harvey’s discovery of the circulation of the blood, which most physiologists of the day derided; and he welcomed Aselli’s discovery of the lacteals, which was rejected by Harvey.293 And though as regards religion his timorous conformities deprive him of any heroic status, it is perhaps not too much to pronounce him “the great reformer and liberator of the European intellect.”294 One not given to warm sympathy with freethought has avowed that “the common root of modern philosophy is the doubt which is alike Baconian and Cartesian.”295

Only less important, in some regards, was the influence of Pierre Gassend or Gassendi (1592–1655), who, living his life as a canon of the Church, reverted in his doctrine to the philosophy of Epicurus, alike in physics and ethics.296 It seems clear that he never had any religious leanings, but simply entered the Church on the advice of friends who pointed out to him how much better a provision it gave, in income and leisure, than the professorship he held in his youth at the university of Aix.297 Professing like Descartes a strict submission to the Church, he yet set forth a theory of things which had in all ages been recognized as fundamentally irreconcilable with the Christian creed; and his substantial exemption from penalties is to be set down to his position, his prudence, and his careful conformities. The correspondent of Galileo and Kepler, he was the friend of La Mothe le Vayer and Naudé; and Gui Patin was his physician and intimate.298 Strong as a physicist and astronomer where Descartes was weak, he divides with him and Galileo the credit of practically renewing natural philosophy; Newton being Gassendist rather than Cartesian.299 Indeed, Gassendi’s youthful attack on the Aristotelian physics (1624) makes him the predecessor of Descartes; and he expressly opposed his contemporary on points of physics and metaphysics on which he thought him chimerical, and so promoted unbelief where Descartes made for orthodoxy.300 Of the criticisms on his Méditations to which Descartes published replies, those of Gassendi are, with the partial exception of those of Hobbes, distinctly the most searching and sustained. The later position of Hume, indeed, is explicitly taken up in the first objection of Cratérus;301 but the persistent pressure of Gassendi on the theistic and spiritistic assumptions of Descartes reads like the reasoning of a modern atheist.302 Yet the works of Descartes were in time placed on the Index, condemned by the king’s council, and even vetoed in the universities, while those of Gassendi were not, though his early work on Aristotelianism had to be stopped after the first volume because of the anger it aroused.303 Himself one of the most abstemious of men,304 like his master Epicurus (of whom he wrote a Life, 1647), he attracted disciples of another temperamental cast as well as many of his own; and as usual his system is associated with the former, who are duly vilified by orthodoxy, although certainly no worse than the average orthodox.

Among his other practical services to rationalism was a curious experiment, made in a village of the Lower Alps, by way of investigating the doctrine of witchcraft. A drug prepared by one sorcerer was administered to others of the craft in presence of witnesses. It threw them into a deep sleep, on awakening from which they declared that they had been at a witches’ Sabbath. As they had never left their beds, the experiment went far to discredit the superstition.305 One significant result of the experiment was seen in the course later taken by Colbert in overriding a decision of the Parlement of Rouen as to witchcraft (1670). That Parlement proposed to burn fourteen sorcerers. Colbert, who had doubtless read Montaigne as well as Gassendi, gave Montaigne’s prescription that the culprits should be dosed with hellebore—a medicine for brain disturbance.306 In 1672, finally, the king issued a declaration forbidding the tribunals to admit charges of mere sorcery;307 and any future condemnations were on the score of blasphemy and poisoning. Yet further, in the section of his posthumous Syntagma Philosophicum (1658) entitled De Effectibus Siderum,308 Gassendi dealt the first great blow on the rationalist side to the venerable creed of astrology, assailed often, but to little purpose, from the side of faith; bringing to his task, indeed, more asperity than he is commonly credited with, but also a stringent scientific and logical method, lacking in the polemic of the churchmen, who had attacked astrology mainly because it ignored revelation. It is sobering to remember, however, that he was one of those who could not assimilate Harvey’s discovery of the circulation of the blood, which Descartes at once adopted and propounded.

Such anomalies meet us many times in the history of scientific as of other lines of thought; and the residual lesson is the recognition that progress is infinitely multiplex in its causation. Nothing is more vital in this regard than scientific truth, which is as a light-house in seas of speculation; and those who, like Galileo and Descartes, add to the world’s exact knowledge, perform a specific service not matched by that of the Bacons, who urge right method without applying it. Yet in that kind also an incalculable influence has been wielded. Many minds can accept scientific truths without being thereby led to scientific ways of thought; and thus the reasoners and speculators, the Brunos and the Vaninis, play their fruitful part, as do the mentors who turn men’s eyes on their own vices of intellectual habit. And in respect of creeds and philosophies, finally, it is not so much sheer soundness of result as educativeness of method, effectual appeal to the thinking faculty and to the spirit of reason, that determines a thinker’s influence. This kind of impact we shall find historically to be the service done by Descartes to European thought for a hundred years.

From Descartes, then, as regards philosophy, more than from any professed thinker of his day, but also from the other thinkers we have noted, from the reactions of scientific discovery, from the terrible experience of the potency of religion as a breeder of strife and its impotence as a curber of evil, and from the practical freethinking of the more open-minded of that age in general, derives the great rationalistic movement, which, taking clear literary form first in the seventeenth century, has with some fluctuations broadened and deepened down to our own day.