Matthew 5:41

"If any one shall compel thee to go one mile, go with him twain." Seest thou the height of self-denial? in this at least, that after giving thy coat, and thy cloak, not even if thine enemy should wish to use thy naked body for hardships and labors, not even so (saith He), must thou forbid him. For He would have us possess all things in common, both our bodies and our goods, as with them that are in need, so with them that insult us: for the latter comes of manliness, the former of mercifulness. Because of this, He said, "If any one shall compel thee to go one mile, go with him twain:" again leading thee higher up, and commanding thee to show forth the same kind of ambition. For if the things of which He spake at the beginning, being far less than these, have so great blessings pronounced on them; consider what sort of portion awaits them, who duly perform these, and what they become even before their rewards, in a human and passible body winning entire freedom from passion. Since when neither insult, nor blows, nor the spoiling of their property, galls them; while they give way to no such thing, but rather add in large measure to their endurance; reflect what kind of training their soul is undergoing. On this account then, as in regard of blows, as in regard of our goods, so in this case also, He hath bidden us act. "For why," saith He, "do I mention insult, and property? Though he should want to make use of thy very own limbs for toil and weary work, and this unjustly, do thou again conquer and overpass His unjust desire." For "to compel" is this, to drag unjustly and without any reason, and by way of despite. Nevertheless, for this also be thou ready in thy station, so as to suffer more than the other would fain do to thee.

The third kind of wrongs, which is in the matter of labour, consists of both such as admit restitution, and such as do not—or with or without revenge—for he who forcibly presses a man's service, and makes him give him aid against his will, can either be punished for his crime, or return the labour. In this kind of wrongs then, the Lord teaches that the Christian mind is most patient, and prepared to endure yet more than is offered; If a man constrain thee to go with him a mile, go with him yet other two. This likewise is meant not so much of actual service with your feet, as of readiness of mind. Let us suppose it therefore said, Go with him other two that the number three might be completed; by which number perfection is signified; that whoever does this might remember that he is fulfilling perfect righteousness. For which reason he conveys this precept under three examples, and in this third example, he adds a twofold measure to the one single measure, that the threefold number may be complete. Or we may so consider as though in enforcing this duty, He had begun with what was easiest to bear, and had advanced gradually. For first He commanded that when the right cheek was smitten we should turn the other also; therein showing ourselves ready to endure another wrong less than that you have already received. Secondly, to him that would take your coat, he bids you part with your cloak, (or garment, as some copies read,) which is either just as great a loss, or perhaps a little greater. In the third He doubles the additional wrong which He would have us ready to endure. And seeing it is a small thing not to hurt unless you further show kindnesses, He adds, To him that asketh of thee, give.