Revenge is a powerful internal force. But revenge is counter-productive, reopening and aggravating emotional wounds. Because the person who feels wronged is angry and hurt, thinking revenge will somehow even the score, and take away the pain.
But revenge is far more destructive than the original offense. In the classic novel Moby Dick, Captain Ahab is obsessed with seeking revenge on the white whale, Moby Dick. His long effort results in the death and destruction of the entire crew except for the narrator Ishmael. Captain Ahab is caught in a harpoon line and is dragged down to his death by the whale.