3 Let no one fear to lay out upon the poor, let no one think that he is the receiver whose hand he sees. He receives it Who bade you give it. And this I say not out of my own heart, or by any human conjecture; hear Him Himself, who at once exhorts you, and gives you a title of security. “I was an hungred,” says He, and you gave Me meat. And when after the enumeration of all their kind offices, they answered, “When saw we You an hungred?” He answered, “Inasmuch as you have done it unto one of the least of these of Mine, you have done it unto Me.” It is the poor man who begs, but He that is Rich receives.
You give to one who will make away with it, He receives it Who will restore it. Nor will He restore only what He receives; He is pleased to borrow upon interest, He promises more than you have given. Give the rein now to your avarice, imagine yourself an usurer. If you were an usurer indeed, you would be rebuked by the Church, confuted by the word of God, all your brethren would execrate you, as a cruel usurer, desiring to wring gain from other's tears. But now be an usurer, no one will hinder you. You are willing to lend to a poor man, who whenever he may repay you will do it with grief; but lend now to a debtor who is well able to pay, and who even exhorts you to receive what he promises.
Source: Sermons on Selected Lessons of the New Testament (New Advent)