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

If you tell me precisely what it is a machine cannot do, then I can always make a machine which will do just that.

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

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.

There's no sense in being precise when you don't even know what you're talking about.

You wake me up early in the morning to tell me I am right? Please wait until I am wrong.

You insist that there is something a machine cannot do. If you tell me precisely what it is a machine cannot do, then I can always make a machine which will do just that.