Holding onto anger toward another person is like holding a sharp object in the palm of your hand. The harder you squeeze, the more you suffer. If we cast blame, saying, "He makes me so angry" or "She is ruining my life," it's like blaming the sharp object for our pain – when we're the one doing the squeezing!
When we let go of anger and resentment, it's like releasing our grip of the sharp object. Hanging onto anger doesn't hurt the other person; it hurts us and our family most of all.