And ye shall also forgive one another your trespasses; for verily I say unto you, he that forgiveth not his neighbor's trespasses when he says that he repents, the same hath brought himself under condemnation. — Mosiah 26:31
"We need to recognize and acknowledge angry feelings. It will take humility to do this, but if we will get on our knees and ask Heavenly Father for a feeling of forgiveness, He will help us. ... Only as we rid ourselves of hatred and bitterness can the Lord put comfort into our hearts. ... When tragedy strikes, we should not respond by seeking personal revenge but rather let justice take its course and then let go. It is not easy to let go and empty our hearts of festering resentment. The Savior has offered to all of us a precious peace through His Atonement, but this can come only as we are willing to cast out negative feelings of anger, spite or revenge. For all of us who forgive 'those who trespass against us,' even those who have committed serious crimes, the Atonement brings a measure of peace and comfort" (President James E. Faust, second counselor in the First Presidency, April 2007 general conference).