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

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

What is outside my mind means nothing to it.

Sanity is madness put to good uses; waking life is a dream controlled.

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

Madness need not be all breakdown. It may also be breakthrough.

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.

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

Brains are the only things worth having in this world.

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

Not all heads have a brain.

The mind is not, I know, a highway but a temple, and its doors should not be carelessly left open.

In psychoanalysis nothing is true except the exaggerations.