Science was born as a result and consequence of philosophy; it cannot survive without a philosophical base. If philosophy perishes, science will be next to go.

The moral is the chosen, not the forced; the understood, not the obeyed. The moral is the rational, and reason accepts no commandments.

The great creators-the thinkers, the artists, the scientists, the inventors-stood alone against the men of their time.

What is kinder--to believe the best of people and burden them with a nobility beyond their endurance--or to see them as they are, and accept it because it makes them comfortable?

Let no man posture as an advocate of peace if he proposes or supports any social system that initiates the use of force against individual men, in any form.

There's only one passion in most artists more violent than their desire for admiration: their fear of identifying the nature of such admiration as they do receive.

Freedom of association includes the freedom not to associate.