This is the knowledge I would share with you: nursing a grudge only perpetuates the offender’s power over you. He continues to live in your head, reinforcing your frustration, polluting your imagination with thoughts of getting even. Don’t let him get away with that. He may or may not deserve forgiveness, but you deserve better than to waste your energy being angry at him. Letting go is the best revenge. Forgiveness is the identifying marker of the stronger party to the dispute. It is truly a favor you do yourself, not an undeserved gesture to the person who hurt you. Be kind to yourself and forgive.
— Harold S. Kushner, Nine Essential Things I’ve Learned About Life, p. 75