Basil the Great
Catena Aurea · Lukasevangelium 6
But I say unto you which hear, Love your enemies, do good to them which hate you, Bless them that curse you, and pray for them which despitefully use you. And unto him that smiteth thee on the one cheek offer also the other; and him that taketh away thy cloke forbid not to take thy coat also. Give to every man that asketh of thee; and of him that taketh away thy goods ask them not again. And as ye would that men should do to you, do ye also to them likewise. It follows, Bless them that curse you.
(in Esai. 1, 23. in App.) But we almost all of us offend against this command, and especially the powerful and rulers, not only if they have suffered insult, but if respect is not paid them, accounting all those their enemies who treat them with less consideration than they think they deserve. But it is a great dishonour in a prince to be ready to take revenge. For how shall he teach another, to return to no man evil for evil (Rom. 12:17.), if he is eager to retaliate on him who injures him.