Norman Vincent Peale — The word resentment…

The word resentment means to re-feel…to feel again.  Someone wrongs or wounds you; in resenting it, you re-feel the injury.  And you re-hurt yourself.  The Hebrew Talmud says that a person who bears a grudge is “Like one who, having cut one hand while handling a knife, avenges himself by stabbing the other hand.”
Norman Vincent Peale