
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.
(in reg. brev. 176.) It is indeed the part of an enemy to injure and be treacherous. Every one then who does harm in any way to any one is called his enemy.