"Don't go around saying the world owes you a living. The world owes you nothing. It was here first."

"The two most important days in your life are the day you are born and the day you find out why."

"Why shouldn't I be an optimist? I have nothing to lose."

"I was educated in the public schools of Missouri, which were not good enough to do me any harm."

"To be good is noble, but to teach others how to be good is nobler and no trouble."