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.

Science is a way of life which can only flourish when men are free to have faith.

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

Am I really a good mathematician?

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

Any use of a human being in which less is demanded of him and less is attributed to him than his full status is a degradation and a waste.

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.