"My religion consists of a humble admiration of the illimitable superior spirit who reveals himself in the slight details we are able to perceive with our frail and feeble mind."
"Intellectual growth should commence at birth and cease only at death."
"If you want your children to be intelligent, read them fairy tales. If you want them to be more intelligent, read them more fairy tales."
"I cannot imagine a God who rewards and punishes the objects of his creation, whose purposes are modeled after our own -- a God, in short, who is but a reflection of human frailty. Neither can I believe that the individual survives the death of his body, although feeble souls harbor such thoughts through fear or ridiculous egotisms."
"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."
"The most incomprehensible thing about the world is that it is at all comprehensible."