All history is the history of thought.

What a man is ashamed of is always at bottom himself; and he is ashamed of himself at bottom always for being afraid.

Art is community's medicine for that worst disease of the mind, the corruption of consciousness

The history of thought, and therefore all history, is the re-enactment of past thought in the historian's own mind.

A man ceases to be a beginner in any given science and becomes a master in that science when he has learned that... he is going to be a beginner all his life.

The aim of science is to apprehend this purely intelligible world as a thing in itself, an object which is what it is independently of all thinking, and thus antithetical to the sensible world.... The world of thought is the universal, the timeless and spaceless, the absolutely necessary, whereas the world of sense is the contingent, the changing and moving appearance which somehow indicates or symbolizes it.

Perfect Freedom is reserved for the man who lives by his own work, and in that work does what he wants to do.