By this it appears that, however the scribes and Pharisees had corrupted the law, not only the commandment of loving our brethren, but even that of loving our enemies, was not only a new, but also an old commandment, an Old Testament commandment, though our Saviour has given it to us with the new enforcement of his own great example in loving us when we were enemies. Observe, 1. How we must express our love to our enemies by the real offices of kindness, even those that are expensive to ourselves and most acceptable to them: "If they be hungry and thirsty, instead of pleasing thyself with their distress and contriving how to cut off supplies from them, relieve them, as Elisha did the Syrians that came to apprehend him," Kg2 6:22. 2. What encouragement we have to do so. (1.) It will be a likely means to win upon them, and bring them over to be reconciled to us; we shall mollify them as the refiner melts the metal in the crucible, not only by putting it over the fire, but by heaping coals of fire upon it. The way to turn an enemy into a friend is, to act towards him in a friendly manner. If it do not gain him, it will aggravate his sin and punishment, and heap the burning coals of God's wrath upon his head, as rejoicing in his calamity may be an occasion of God's turning his wrath from him, Pro 24:17. (2.) However, we shall be no losers by our self-denial: "Whether he relent towards thee or no, the Lord shall reward thee; he shall forgive thee who thus showest thyself to be of a forgiving spirit. He shall provide for thee when thou art in distress (though thou hast been evil and ungrateful), as thou dost for thy enemy; at least it shall be recompensed in the resurrection of the just, when kindnesses done to our enemies shall be remembered as well as those shown to God's friends."

If thine enemy be hungry, give him bread to eat,.... Which includes all manner of food; whatever persons may have in their houses, that they should bring out and feed the hungry with, even though an enemy;

and if he be thirsty, give him water to drink; which was what was usually and in common drank in those countries. These two, bread and water, take in all the necessaries of life; and giving them is expressive of all acts of beneficence and humanity to be performed to enemies; see Kg2 6:22; or "drink to him", so Pagninus and Montanus; which is still more expressive of respect and kindness.

(Compare Mat 5:44; Rom 12:20). As metals are melted by heaping coals upon them, so is the heart softened by kindness.