When we encounter a natural style we are always surprised and delighted, for we thought to see an author and found a man

When we see a natural style, we are astonished and charmed; for we expected to see an author, and we find a person.

One must know oneself. If this does not serve to discover truth, it at least serves as a rule of life, and there is nothing better.

Man's greatness lies in his power of thought.

Through space the universe encompasses and swallows me up like an atom; through thought I comprehend the world.

I can well conceive a man without hands, feet, head. But I cannot conceive man without thought; he would be a stone or a brute.