John Chrysostom

"Love worketh no ill to his neighbor, therefore love is the fulfilling of the Law."

Observe how it has both virtues, abstinence from evils (for it "worketh no ill," he says), and the working of good deeds. "For it is," he says, "the fulfilling (or filling up) of the Law;" not bringing before us instruction only on moral duties in a concise form, but making the accomplishment of them easy also. For that we should become acquainted with things profitable to us was not all that he was careful for (which is the Law's care), but also with a view to the doing of them it brought us great assistance; accomplishing not some part of the commandments, but the whole sum of virtue in us. Let us then love one another, since in this way we shall also love God, Who loveth us. For in the case of men, if you love a man's beloved, he that loveth him is contentious at it. But here He deemeth thee worthy to share His love, and hateth thee when thou sharest not. For man's love is laden with envy and grudging; but God's is free from all passion, whence also He seeketh for those to share His love. For He says, love thou with Me, and then thyself also will I love the more. You see the words of a vehement lover! If thou love My beloved, then will I also reckon Myself to be greatly beloved of thee. For He vehemently desireth our salvation, and this He showed from of old.