There is not a discovery in science, however revolutionary, however sparkling with insight, that does not arise out of what went before.

There is nothing frightening about an eternal dreamless sleep. Surely it is better than eternal torment in Hell and eternal boredom in Heaven.

Any teacher that can be replaced by a computer should be replaced by a computer.

I am not a speed reader. I am a speed understander.

Even as a youngster, though, I could not bring myself to believe that if knowledge presented danger, the solution was ignorance.

I'm gradually managing to cram my mind more and more full of things. I've got this beautiful mind and it's going to die, and it'll all be gone. And then I say, not in my case. Every idea I've ever had I've written down, and it's all there on paper. And I won't be gone; it'll be there.

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