Mathematics is a field which has often been compared with chess, but differs from the latter in that it is only one's best moments that count and not one's worst.

Let us remember that the automatic machine is the precise economic equivalent of slave labor. Any labor which competes with slave labor must accept the economic consequences of slave labor.

Any useful logic must concern itself with Ideas with a fringe of vagueness and a Truth that is a matter of degree.

Progress imposes not only new possibilities for the future but new restrictions.

Information is information; it is neither matter nor energy.

There is one quality more important than know-how.... This is know-how by which we determine not only how to accomplish our purposes, but what our purposes are to be.

One of the chief duties of the mathematician in acting as an advisor ... is to discourage ... from expecting too much from mathematics.