An agile but unintelligent and abnormal German, possessed of the mania of grandeur.

It is by those who have suffered that the world has been advanced.

He liked to fish; he seemed to take pride in being able to like such a stupid occupation.

Man has received direct from God only one instrument wherewith to know himself and to know his relation to the universe--he has no other--and that instrument is reason.

Before we can study the central issues of life today, we must destroy the prejudices and fallacies born of previous centuries.

Conceit is incompatible with understanding.

There can be no peace for us, only misery, and the greatest happiness.