There once was this young guy -- a nice fellow. He fell in love, got married. That was the good part. But then his wife dumped him. He got sad. He got mad.
Time went by and he got bitter. He walked away from God.
God told us, "Be tolerant of one another and forgive each other if anyone has a complaint against another. Just as the Lord has forgiven you, you also should forgive." He also said, "In your anger do not sin: Do not let the sun go down while you are still angry, and do not give the devil a foothold."