When I was a child, the Earth was said to be two billion years old. Now scientists say it's four and a half billion. So that makes me two and a half billion.

The purpose of life is to conjecture and prove.

If numbers aren't beautiful, I don't know what is.

God has the Big Book, the beautiful proofs of mathematical theorems are listed here.

Here I am: My brain is open.

Television is something the Russians invented to destroy American education.

There'll be plenty of time to rest in the grave.