To acquire immunity to eloquence is of the utmost importance to the citizens of a democracy.

Science is what we know, and philosophy is what we don't know.

The modern man thinks that everything ought to be done for the sake of something else, and never for its own sake.

No one gossips about other people's secret virtues.

Protagoras did not know if the gods exist, but he held in any case they ought to be worshiped. Philosophy, according to him, had nothing edifying to teach, and for the survival of morals we must rely upon the thoughtlessness of the majority and their willingness to believe what they had been taught.

A process which led from the amoeba to man appeared to the philosophers to be obviously a progress though whether the amoeba would agree with this opinion is not known.

Joy of life... depends upon a certain spontaneity in regard to sex. Where sex is repressed, only work remains, and a gospel of work for work's sake never produced any work worth doing.