Body am I entirely, and nothing else; and soul is only a word for something about the body.

Does not the discipline of the scientific spirit just commence when one no longer harbours any conviction?

Man is more ape than many of the apes.

I go in solitude, so as not to drink out of everybody's cistern. When I am among the many I live as the many do, and I do not think I really think; after a time it always seems as if they want to banish myself from myself and rob me of my soul.

Admiration for a quality or an art can be so strong that it deters us from striving to possess it.

One unconsciously takes it for granted that doer and sufferer think and feel alike, and according to this supposition we measure the guilt of the one by the pain of the other.

You cannot learn to fly by flying. First you must learn to walk, to run, to climb, to dance.