Proverbs 25:21-22

If thine enemy be hungry, give him bread, &c. By bread and water he intends all things necessary for his subsistence; for thou shalt heap coals of fire upon his head If he have the least spark of goodness in him, such conduct in thee toward him will work a change in his mind, and make him throw off all his enmities; thou shalt melt him into repentance, and inflame him with love and kindness to thee for so unexpected and undeserved a favour; or, as Dr. Doddridge paraphrases the words, Romans 12:20, (where they are quoted by St. Paul verbatim from the translation of the LXX.,) “Thou wilt touch him so sensibly, that he will no more be able to stand against such conduct than to bear on his head burning coals; but will rather submit to seek thy friendship, and endeavour, by future kindnesses, to overbalance the injury.” Or, if it have not this effect, but he still hardens his heart against thee, he shall have so much the sorer punishment; these coals shall consume him. And the Lord shall reward thee Thy charity to him shall be fully recompensed to thee, if not by him yet, by God, which will be far better. In other words, as is the plain meaning of the passage, “Be kind to your enemy, for that is the surest way to gain his love and God's blessing.” That St. Paul understood it in this sense is manifest from the words which he immediately subjoins, after quoting it, Be not overcome of evil, but overcome evil with good, in which he evidently explains what is meant by heaping coals of fire on an enemy's head, namely, by acts of kindness, to soften his heart and dispose him to friendship; which is the natural effect of a generous unexpected goodness. The phrase seems to be taken from melting metals in a crucible; for when gold or silver is melted in that manner they not only put fire under and round all the sides, but also heap coals of fire upon the head of the crucible, and so melt the metal. In allusion to this, we are to heap acts of kindness and beneficence upon the head of an enemy, and so melt down his obstinacy, bring him to a better temper, and overcome his evil by our good: which is noble, glorious, reasonable, and truly Christian: see Schultens on this place. It is justly observed by Mr. Scott here; that as St. Paul's quoting this passage is a strong testimony to the divine authority of the book from which it is taken, so it clearly evinces that the rule of duty in this case is the same in both testaments, however ancient scribes and Pharisees, and many modern writers, have overlooked it. “The law of love, perhaps, is not expounded more spiritually, in any single precept, either of Christ or his apostles, than in this exhortation. Seize the moment of distress to show kindness to him that hates thee.”