"Not to be absolutely certain is, I think, one of the essential things in rationality."

"I've always thought respectable people scoundrels, and I look anxiously at my face every morning for signs of my becoming a scoundrel."

"The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts."

"Few people can be happy unless they hate some other person, nation, or creed."

"One of the symptoms of an approaching nervous breakdown is the belief that one's work is terribly important."

"Three passions, simple but overwhelmingly strong, have governed my life: the longing for love, the search for knowledge, and unbearable pity for the suffering of mankind."

"Not only is life a bitch, it has puppies."

"Life is a disease; and the only diference between one another is the stage of the disease at which he lives."

"The best ideas come as jokes. Make your thinking as funny as possible."

"'Yields falsehood when preceded by its quotation' yields falsehood when preceded by its quotation."

"May I never miss a sunset or a rainbow because I am looking down."

"In order to write about life, first you must live it!"