2.

One of your doubts is as to using the services of a man who has guaranteed his fidelity by swearing by his false gods. In this matter I beg you to consider whether, in the event of a man failing to keep his word after having pledged himself by such an oath, you would not regard him as guilty of a twofold sin. For if he kept the engagement which he had confirmed by this oath, he would be pronounced guilty in this only, that he swore by such deities; but no one would justly blame him for keeping his engagement. But in the case supposed, seeing that he both swore by those whom he should not worship, and did, notwithstanding his promise, what he should not have done, he was guilty of two sins: whence it is obvious that in using, not for an evil work, but for some good and lawful end, the service of a man whose fidelity is known to have been confirmed by an oath in the name of false gods, one participates, not in the sin of swearing by the false gods, but in the good faith with which he keeps his promise. The faith which I here speak of as kept is not that on account of which those who are baptized in Christ are called faithful: that is entirely different and far removed from the faith desiderated in regard to the arrangements and compacts of men. Nevertheless it is, beyond all doubt, worse to swear falsely by the true God than to swear truly by the false gods; for the greater the holiness of that by which we swear, the greater is the sin of perjury. It is therefore a different question whether he is not guilty who requires another to pledge himself by taking an oath in the name of his gods, seeing that he worships false gods. In answering this question, we may accept as decisive those examples which you yourself quoted of Laban and of Abimelech (if Abimelech did swear by his gods, as Laban swore by the god of Nahor). This is, as I have said, another question, and one which would perchance perplex me, were it not for those examples of Isaac and Jacob, to which, for aught I know, others might be added. It may be that some scruple might yet be suggested by the precept in the New Testament, "Swear not at all;" ¹ words which were in my opinion spoken, not because it is a sin to swear a true oath, but because it is a heinous sin to forswear oneself: from which crime our Lord would have us keep at a great distance, when He charged us not to swear at all. I know, however, that our opinion is different: wherefore it should not be discussed at present; let us rather treat of that about which you have thought of asking my advice. On the same ground on which you forbear from swearing yourself, you may, if such be your opinion, regard it as forbidden to exact an oath from another, although it is expressly said, Swear not; but I do not remember reading anywhere in Holy Scripture that we are not to take another's oath. The question whether we ought to take advantage of the concord which is established between other parties by their exchange of oaths is entirely different. If we answer this in the negative, I know not whether we could find any place on earth in which we could live. For not only on the frontier, but throughout all the provinces, the security of peace rests on the oaths of barbarians. And from this it would follow, that not only the crops which are guarded by men who have sworn fidelity in the name of their false gods, but all things which enjoy the protection secured by the peace which a similar oath has ratified, are defiled. If this be admitted by you to be a complete absurdity, dismiss with it your doubts on the cases which you named.