+ Mt 5: 43-48
“You have heard that it was said, ‘You shall love your neighbor and hate your enemy.’
But I say to you, love your enemies, and pray for those who persecute you,
that you may be children of your heavenly Father, for he makes his sun rise on the bad and the good, and causes rain to fall on the just and the unjust.
For if you love those who love you, what recompense will you have? Do not the tax collectors do the same?
And if you greet your brothers only, what is unusual about that? Do not the pagans do the same?
So be perfect, just as your heavenly Father is perfect.
The New American Bible
The Catechism of the Catholic Church
2054 Jesus acknowledged the Ten Commandments, but he also showed the power of the Spirit at work in their letter. He preached a “righteousness which exceeds that of the scribes and Pharisees” as well as that of the Gentiles. He unfolded all the demands of the Commandments. “You have heard that it was said to the men of old, ‘You shall not kill.’ . . . But I say to you that everyone who is angry with his brother shall be liable to judgment.”
1933 This same duty extends to those who think or act differently from us. The teaching of Christ goes so far as to require the forgiveness of offenses. He extends the commandment of love, which is that of the New Law, to all enemies. Liberation in the spirit of the Gospel is incompatible with hatred of one’s enemy as a person, but not with hatred of the evil that he does as an enemy.
2303 Deliberate hatred is contrary to charity. Hatred of the neighbor is a sin when one deliberately wishes him evil. Hatred of the neighbor is a grave sin when one deliberately desires him grave harm. “But I say to you, Love your enemies and pray for those who persecute you, so that you may be sons of your Father who is in heaven.”