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

The more we get out of the world the less we leave, and in the long run we shall have to pay our debts at a time that may be very inconvenient for our own survival.

We have modified our environment so radically that we must now modify ourselves to exist in this new environment.

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.

Any labor which competes with slave labor must accept the economic conditions of slave labor.

Am I really a good mathematician?

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.