Understanding is a very dull occupation.

What is outside my mind means nothing to it.

In psychoanalysis nothing is true except the exaggerations.

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

Brains are the only things worth having in this world.

Don’t lose your mind unless you have paid for it.

Strength of mind is exercise, not rest.

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

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

The march of the human mind is slow.

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

Not all heads have a brain.

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