He had read much, if one considers his long life; but his contemplation was much more than his reading. He was wont to say that if he had read as much as other men he should have known no more than other men.

After years of finding mathematics easy, I finally reached integral calculus and came up against a barrier. I realized that this was as far as I could go, and to this day I have never successfully gone beyond it in any but the most superficial way.

To surrender to ignorance and call it God has always been premature, and it remains premature today.

What would I do if I knew I only had six months to live? Type faster.

I expect death to be nothingness and, for removing me from all possible fears of death, I am thankful to atheism.

Democracy cannot survive overpopulation.

The human brain, then, is the most complicated organization of matter that we know.