“Success does not consist in never making mistakes but in never making the same one a second time.”

“The man with toothache thinks everyone happy whose teeth are sound. The poverty stricken man makes the same mistake about the rich man.”

“Make it a rule never to give a child a book you would not read yourself.”

“A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing.”

“[Chess] is a foolish expedient for making idle people believe they are doing something very clever, when they are only wasting their time. ”

“Would the world ever have been made if its maker had been afraid of making trouble?Making life means makingtrouble. There’s only one way of escaping trouble; and that’s killing things.”

“Suppose the world were only one of God's jokes, would you work any the less to make it a good joke instead of a bad one?”