If the human being is condemned and restricted to perform the same functions over and over again, he will not even be a good ant, not to mention a good human being.

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.

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.

To live effectively is to live with adequate information.

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

There is one quality more important than "know-how" and we cannot accuse the United States of any undue amount of it. This is "know-what" by which we determine not only how to accomplish our purposes, but what our purposes are to be.

Scientific discovery consists in the interpretation for our own convenience of a system of existence which has been made with no eye to our convenience at all.