The African tribesman, with his complete contempt for truth and his emphasis on brutality and savagery for others but not for himself, is a no-civilization.

All we know of science or of religion comes from philosophy. It lies behind and above all other knowledge we have or use.

As long as children and young men and women find pleasure in study, they will continue studying throughout life - and upon that depends their happiness.

Always maintain good relations with your public.

It is not man's dreams that fail him. It is the lack of know-how required to bring those dreams into actuality.

You don't get rich writing science fiction. If you want to get rich, you start a religion.

A person is either the effect of his environment or is able to have an effect upon his environment.