Vowing never to seek revenge is not the same as vowing never to want to get even again. People will hurt you and you will want to get even with them. This is just part of human life. But here is a ritual to help dissipate the desire for revenge. When you feel like getting back at someone who has hurt you, write out on a piece of paper your plan for getting even. Make one up if you don't actually have one. Then with prayers to become a more forgiving person, burn the paper in a small pot, in the fireplace, or over a candle. As the paper goes up in smoke, ask that your own desire for revenge go up with it. Then renew your vow never to seek revenge.

Tom Cowan in The Way of the Saints