I don't expect to live forever, nor do I repine over that, but I am weak enough to want to be remembered forever. - Yet how few of those who have lived, even of those who have accomplished far more than I have, linger on in world memory for even a single century after death

Intuition is the art, peculiar to the human mind, of working out the correct answer from data that is, in itself, incomplete or even, perhaps, misleading.

To test a perfect theory with imperfect instruments did not impress the Greek philosophers as a valid way to gain knowledge.

When I feel difficulty coming on, I switch to another book I'm writing. When I get back to the problem, my unconscious has solved it.

Humanity is cutting down its forests, apparently oblivious to the fact that we may not be able to live without them.

It is precisely because it is fashionable for Americans to know no science, even though they may be well educated otherwise, that they so easily fall prey to nonsense.

Every religion seems like a fantasy to outsiders, but as holy truth to those of the faith.