You don't have to believe in God, but you should believe in The Book.

I'll tell you once, and I'll tell you again. There's always a prime between n and 2n.

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

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

Végre nem butulok tovább (I've finally stopped getting dumber).

Finally I am becoming stupider no more.

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.