All stable processes we shall predict. All unstable processes we shall control.

Neumann, to a physicist seeking help with a difficult problem: Simple. This can be solved by using the method of characteristics. Physicist: I'm afraid I don't understand the method of characteristics. Neumann: In mathematics you don't understand things. You just get used to them.

The total subject of mathematics is clearly too broad for any of us. I do not think that any mathematician since Gauss has covered it uniformly and fully; even Hilbert did not and all of us are of considerably lesser width quite apart from the question of depth than Hilbert.

Computers are like humans - they do everything except think.

Any one who considers arithmetical methods of producing random digits is, of course, in a state of sin.

Truth is much too complicated to allow anything but approximations.

Anyone who attempts to generate random numbers by deterministic means is, of course, living in a state of sin.