There are three signs of senility. The first sign is that a man forgets his theorems. The second sign is that he forgets to zip up. The third sign is that he forgets to zip down.

Television is something the Russians invented to destroy American education.

The purpose of life is to conjecture and prove.

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

Mathematics is the surest way to immortality. If you make a big discovery in mathematics, you will be remembered after everyone else will be forgotten

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

Every human activity, good or bad, except mathematics, must come to an end.