Organic life, we are told, has developed gradually from the protozoon to the philosopher, and this development, we are assured, is indubitably an advance. Unfortunately it is the philosopher, not the protozoon, who gives us this assurance.

Literature is inexhaustible, with every book a homage to infinity

Only in thought is man a God; in action and desire we are the slaves of circumstance.

Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.

Love as a relation between men and women was ruined by the desire to make sure of the legitimacy of children.

Men are born ignorant, not stupid. They are made stupid by education.

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 I have had it withdrawn from subsequent editions because it is clearly ambiguous.