"Free thought has always been a perquisite of aristocracy."

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

"A habit of basing convictions upon evidence, and of giving to them only that degree of certainty which the evidence warrants, would, if it became general, cure most of the ills from which the world su…"

"Mathematics, rightly viewed, possesses not only truth, but supreme beauty — a beauty cold and austere, like that of sculpture, without appeal to any part of our weaker nature, without the gorgeous tra…"

"I have found that the greatest joy in life is to be able to do what you want to do."