You have heard that it has been said, You shall love your neighbor, and hate your enemy.
All Commentaries on Matthew 5:43 Go To Matthew 5
Augustine of Hippo
AD 430
For without this love, wherewith we are commanded to love even our enemies and persecutors, who can fully carry out those things which are mentioned above? Moreover, the perfection of that mercy, wherewith most of all the soul that is in distress is cared for, cannot be stretched beyond the love of an enemy; and therefore the closing words are: Be therefore perfect, even as your Father who is in heaven is perfect. Yet in such a way that God is understood to be perfect as God, and the soul to be perfect as a soul.