Any man could, if he were so inclined, be the sculptor of his own brain.

If anything affects your eye, you hasten to have it removed; if anything affects your mind, you postpone the cure for a year.

What is outside my mind means nothing to it.

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

Your mind’s got to eat, too.

To be too conscious is an illness—a real thoroughgoing illness.

The highest possible stage in moral culture is when we recognize that we ought to control our thoughts.

my mind is
a big hunk of irrevocable nothing

The real question is not whether machines think but whether men do.

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

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

We need strength, we need energy, we need quickness, and we need brain in this country to turn it around.

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