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

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

Computers are like humans - they do everything except think.

Problems are often stated in vague terms... because it is quite uncertain what the problems really are.

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.

Science, as well as technology, will in the near and in the farther future increasingly turn from problems of intensity, substance, and energy, to problems of structure, organization, information, and control.

There is no point in being precise if you do not even know what you are talking about.