"Adam was the only man who, when he said a good thing, knew that nobody had said it before him."

"I came in with Halley's Comet in 1835. It is coming again next year, and I expect to go out with it. It will be the greatest disappointment of my life if I don't go out with Halley's Comet."

"Life: we laugh and laugh, then cry and cry, then feebler laugh, then die."

"Never argue with stupid people, they will drag you down to their level and then beat you with experience."

"The fear of death follows from the fear of life. A man who lives fully is prepared to die at any time."