The triumph of science has been mainly due to its practical utility, and there has been an attempt to divorce this aspect from that of theory, thus making science more and more a technique, and less and less a doctrine as to the nature of the world. The penetration of this point of view to philosophers is very recent.

Folly is perennial and yet the human race has survived.

Do not use power to suppress opinions you think pernicious, for if you do the opinions will suppress you.

America remained a land of promise for lovers of freedom. Even Byron, at a moment when he was disgusted with Napoleon for not committing suicide, wrote an eloquent stanza in praise of Washington.

This, however, is a passing nightmare; in time the earth will become again incapable of supporting life, and peace will return.

Orthodoxy is the death of intelligence.

You must believe that you can help bring about a better world.