“One of the most difficult speeches to prepare is an address to a graduation class, which is why I don't often do them.”

“I should attempt to treat human vice and folly geometrically... the passions of hatred, anger, envy, and so on, considered in themselves, follow from the necessity and efficacy of nature... I shall...”

“If you can't test it, it's not theorics -- it's metatheorics. A branch of philosophy. So, if you want to think of it this way, our test equipment is what defines the boundary separating theorics fr...”

“Physicists have come to realize that mathematics, when used with sufficient care, is a proven pathway to truth.”

“Marriage must fight constantly against a monster which devours everything: routine.”

“I know that the whole pointthe only pointis tofind the things that matter, and hold on to them, and fight for them, and refuse tolet them go.”

“No one lived forever. But you fought for every minute you could get. Bought a little more with a lot of hard work.”