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.

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.

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.

The nervous system and the automatic machine are fundamentally alike in that they are devices, which make decisions on the basis of decisions they made in the past.

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

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.