I received the fundamentals of my education in school, but that was not enough. My real education, the superstructure, the details, the true architecture, I got out of the public library.

A neat and orderly laboratory is unlikely. It is, after all, so much a place of false starts and multiple attempts.

Intelligence is an accident of evolution, and not necessarily an advantage.

Of course there are worlds. Millions of them! Every star you see has worlds, and most of those you don't see.

When I die I won't go to heaven or hell; there will just be nothingness.

Once, when a religionist denounced me in unmeasured terms, I sent him a card saying, "I am sure you believe that I will go to hell when I die, and that once there I will suffer all the pains and tortures the sadistic ingenuity of your deity can devise and that this torture will continue forever. Isn't that enough for you? Do you have to call me bad names in addition?"

If my doctor told me I had only six minutes to live, I wouldn't brood. I'd type a little faster.