In the Reformation of the sixteenth century the intelligence of Germany, which had hitherto been under the training and tutelage of the Romish church, reached maturity by the application of the formal and material principles of Protestantism,—the sole normative authority of Scripture, and justification by faith alone without works of merit. It emancipated itself from its schoolmaster, who, for selfish ends, had made and still continued to make strenuous efforts to check every movement towards independence, every endeavour after ecclesiastical, theological, and scientific freedom, every struggle after evangelical reform. Yet this emancipation was not completely effected in all the purely German nationalities, much less among those Romanic and Slavonic peoples which had bowed their necks to the papal hierarchy. The Romish church of the Reformation not only adhered to the form and content of its former unevangelical constitution, but also still further developed and formally elaborated its creed in the same unevangelical direction, and the result was a split in the western church into an Evangelical Protestant and a Roman Catholic church. Then again the principles of the Reformation were set forth in different ways, and Protestantism branched off into two divisions, the Lutheran and the Reformed. Besides these three new western churches and the one old eastern church, which all rested upon the common œcumenical basis of the old Catholic church, a variety of sects sprang out of them. Through these greater and lesser divisions, modern church history, where, with some advantages and some disadvantages, one church is pitted against another, possesses a character entirely different from the church history of earlier times.
Modern church history naturally falls into four divisions. The distinguishing characteristic of each is found partly in the opposition of particular churches to one another, partly in the antagonism of faith and unbelief. The transition from one to another corresponds generally with the boundaries of the centuries. The sixteenth century forms the Reformation period, in which the new Protestantism, parted from the old Roman Catholicism, cast off the deformatory elements which had attached themselves to it, and developed for itself a system of doctrine, worship, and constitution; while the Roman Catholic church, from the middle of the century, set to work upon a counter-Reformation, by which it succeeded in large measure in reconquering the field that had been lost. The seventeenth century was characterized on the Protestant side as the age of orthodoxy, in which confessionalism obtained undivided supremacy, deteriorating however in doctrine and life into a frigid formalism, which called forth the movement of Pietism as a corrective; but, on the Roman Catholic side, it was characterized as a period of continued successful restoration. In the eighteenth century begins the struggle against the dominant church and the prevailing conceptions of Christianity in the forms of deism, naturalism, and rationalism within both the Protestant and Catholic churches. The fourth division embraces the nineteenth century. The newly awakened faith strives vigorously with rationalism, and then, on the Protestant side, splits into unionism and confessionalism; while, on the Roman Catholic side, it makes its fullest development in a zealous ultramontanism. But rationalism again renews its youth under the cloak of science, and alongside of it appears a more undisguised unbelief in the distinctly antichristian forms of pantheism, materialism, and communism, which seeks to annihilate everything Christian in church and state, in science and faith, in social and political life.