What is outside my mind means nothing to it.

The sleep of reason produces monsters.

Imagination is the secret and marrow of civilization. It is the very eye of faith.

From a man’s face, I can read his character. If I can see him walk, I know his thoughts.

Understanding is a very dull occupation.

It is far, far better and much safer to have a firm anchor in nonsense than to put out on the troubled seas of thought.

The brain may be regarded as a kind of parasite of the organism, a pensioner, as it were, who dwells with the body.

my mind is
a big hunk of irrevocable nothing

What is the hardest task in the world? To think.

The march of the human mind is slow.

The universe is an object of thought at least as much as it is a means of satisfying needs.

Though this be madness, yet there is method in’t.

As is the face, so is the mind.