Holding anger is a poison. It eats you from the inside. We think that hating is a weapon that attacks the person who harmed us. But hatred is a curved blade. And the harm we do, we do to ourselves.
"Just as there is no loss of basic energy in the universe,
so no thought or action is without its effects,
present or ultimate, seen or unseen, felt or unfelt."
-Norman Cousins (1912-1990)