Jerome
Catena Aurea · Matthäusevangelium 5
Ye have heard that it hath been said, Thou shalt love thy neighbour, and hate thine enemy. But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you and persecute you; That ye may be the children of your Father which is in heaven: for He maketh His sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust. For if ye love them which love you, what reward have ye? do not even the Publicans the same? And if ye salute your brethren only, what do ye more than others? do not even the Publicans so? Be ye therefore perfect, even as your Father which is in heaven is perfect.
Many measuring the commandments of God by their own weakness, not by the strength of the saints, hold these commands for impossible, and say that it is virtue enough not to hate our enemies; but to love them is a command beyond human nature to obey. But it must be understood that Christ enjoins not impossibilities but perfection. Such was the temper of David towards Saul and Absalom; the Martyr Stephen also prayed for his enemies while they stoned him, and Paul wished himself anathema for the sake of his persecutors. (Rom. 9:3.) Jesus both taught and did the same, saying, Father, forgive them, for they know not what they do. (Luke 23:34.)