" When Arthur Lee was sent to France and England to serve as one of America’s diplomats during the Revolutionary War, instead of relishing the opportunity to work with his fellow diplomat Silas Deane and elder statesman Benjamin Franklin, he raged and resented them and suspected them of disliking him. Finally, Franklin wrote him a letter (one that we’ve probably all deserved to get at one point or another): “If you do not cure yourself of this temper,” Franklin advised, “it will end in insanity, of which it is the symptomatic forerunner.” Probably because he was in such command of his own temper, Franklin decided that writing the letter was cathartic enough. He never sent it. "

― Ryan Holiday , Ego Is the Enemy