Matthew 5:9, 16, 23-24, 44-45

“Blessed are the peacemakers, for they shall be called sons of God.

In the same way, let your light shine before others, so that they may see your good works and give glory to your Father who is in heaven.

So if you are offering your gift at the altar and there remember that your brother has something against you, leave your gift there before the altar and go. First be reconciled to your brother, and then come and offer your gift.

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. For he makes his sun rise on the evil and on the good, and sends rain on the just and on the unjust.