Property is a nuisance.
A mathematician is a device for turning coffee into theorems.
Finally I'm 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.
God may not play dice with the universe, but something strange is going on with the prime numbers.
[When asked why are numbers beautiful?] It’s like asking why is Ludwig van Beethoven’s Ninth Symphony beautiful. If you don't see why, someone can't tell you. I know numbers are beautiful. If they aren't beautiful, nothing is.