What a splendid head, yet no brain.

Aesop (620 BC - 560 BC)

Thinking rationally is often different from "positive thinking," in that it is a realistic assessment¹ of the situation, with a view towards rectifying² the problem if possible.

Albert Ellis, Michael Abrams, Lidia Dengelegi, The Art & Science of Rational Eating, 1992

Brain: an apparatus³ with which we think we think.

Ambrose Bierce (1842 - 1914), The Devil's Dictionary

If there is anything in the world that can really be called a man's property, it is surely that which is the result of his mental activity.

Arthur Schopenhauer (1788 - 1860)

Exercising self-restraint can be depleting⁴, yet it can also be ennobling.

Daniel Akst, We Have Met the Enemy: Self-Control in an Age of Excess, 2011

It's essential to tailor rehab to what impassions someone. The brain gradually learns by riveting⁵ its attention-through endless repetitions.

Diane Ackerman, One Hundred Names for Love: A Stroke, A Marriage, and the Language of Healing, 2011

The human brain starts working the moment you are born and never stops until you stand up to speak in public.

George Jessel

Estimated amount of glucose⁶ used by an adult human brain each day, expressed in M&Ms: 250

Harper's Index, October 1989

The brain is a wonderful organ. It starts working the moment you get up in the morning and does not stop until you get into the office.

Robert Frost (1874 - 1963)

The human brain is a most unusual instrument of elegant and as yet unknown capacity.

Stuart Seaton

If little else, the brain is an educational toy.

Tom Robbins (1936 - )

Aristotle was famous for knowing everything. He taught that the brain exists merely to cool the blood and is not involved in the process of thinking. This is true only of certain persons.

Will Cuppy