I never held Negroes to be inherently inferior. The statement in Marriage and Morals refers to environmental conditioning. I have had it withdrawn from subsequent editions because it is clearly ambiguous.

True happiness for human beings is possible only to those who develop their godlike potentialities to the utmost.

All great books contain boring portions, and all great lives have contained uninteresting stretches.

Every increase in knowledge requires an increase in wisdom

It is only through imagination that men become aware of what the world might be; without it, ‘progress’ would become mechanical and trivial.

The secrets to happiness include enterprise, exploration of one's interests and the overcoming of obstacles.

The fundamental concept in social science is Power, in the same sense in which Energy is the fundamental concept in physics.