The empiric easily degenerates into the quack. He does not know where his knowledge begins or leaves off, and so when he gets beyond routine conditions he begins to pretend-to make claims for which there is no justification, and to trust to luck and to ability to impose upon others-to "bluff."

There is more than a verbal tie between the words common, community, and communication.

Adequate control means that the successive acts are brought into a continuous order; each act not only meets its immediate stimulus but helps the acts which follow.

Experience alone cannot deliver to us necessary truths; truths completely demonstrated by reason. Its conclusions are particular, not universal.

If all meanings could be adequately expressed by words, the arts of painting and music would not exist.

To savages it would seem preposterous to seek out a place where nothing but learning was going on in order that one might learn.

The problem of restoring integration and co-operation between man's beliefs about the world in which he lives and his beliefs about values and purposes that should direct his conduct is the deepest problem modern life. It is the problem of any philosophy that is not isolated from life.