16. Contracts oblige us.] To be obliged, and to be tied being obliged, seems to some men to be one and the same thing; and that therefore here seems to be some distinction in words, but none indeed. More clearly therefore, I say thus: that a man is obliged by his contracts, that is, that he ought to perform for his promise sake; but that the law ties him being obliged, that is to say, it compels him to make good his promise for fear of the punishment appointed by the law.
17. Yet is it to be referred to sins of imprudence.] Many find fault that I have referred atheism to imprudence, and not to injustice; yea by some it is taken so, as if I had not declared myself an enemy bitter enough against atheists. They object further, that since I had elsewhere said that it might be known there is a God by natural reason, I ought to have acknowledged that they sin at least against the law of nature, and therefore are not only guilty of imprudence, but injustice too. But I am so much an enemy to atheists, that I have both diligently sought for, and vehemently desired to find some law whereby I might condemn them of injustice. But when I found none, I inquired next what name God himself did give to men so detested by him. Now God speaks thus of the atheist: The fool hath said in his heart, there is no God. Wherefore I placed their sin in that rank which God himself refers to. Next I show them to be enemies of God. But I conceive the name of an enemy to be sometimes somewhat sharper, than that of an unjust man. Lastly, I affirm that they may under that notion be justly punished both by God, and supreme magistrates; and therefore by no means excuse or extenuate this sin. Now that I have said, that it might be known by natural reason that there is a God, is so to be understood, not as if I had meant that all men might know this; except they think, that because Archimedes by natural reason found out what proportion the circle hath to the square, it follows thence, that every one of the vulgar could have found out as much. I say therefore, that although it may be known to some by the light of reason that there is a God; yet men that are continually engaged in pleasures or seeking of riches and honour; also men that are not wont to reason aright, or cannot do it, or care not to do it; lastly, fools, in which number are atheists, cannot know this.