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

In all important respects, the man who has nothing but his physical power to sell has nothing to sell which it is worth anyone's money to buy

Science is better paid than at any time in the past. The results of this pay have been to attract into science many of those for whom the pay is the first consideration, and who scorn to sacrifice immediate profit for the freedom of development of their own concept. Moreover, this inner development, important and indispensable as it may be to the world of science in the future, generally does not have the tendency to put a single cent into the pockets of their employers.

A professor is one who can speak on any subject - for precisely fifty minutes.

Progress imposes not only new possibilities for the future but new restrictions. It seems almost as if progress itself and our fight against the increase of entropy intrinsically must end in the downhill path from which we are trying to escape.

It is possible to believe in progress as a fact without believing in progress as an ethical principle; but in the catechism of many Americans, the one goes with the other.

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