Not all heads have a brain.
—French proverbQuotes
What a torture to talk to filled heads that allow nothing from the outside to enter them.
—Joseph Joubert, 1807The brain may be regarded as a kind of parasite of the organism, a pensioner, as it were, who dwells with the body.
—Arthur Schopenhauer, 1851The mind is not, I know, a highway but a temple, and its doors should not be carelessly left open.
—Margaret Fuller, 1844Sooner or later if the activity of the mind is restricted anywhere, it will cease to function even where it is allowed to be free.
—Edith Hamilton, 1930“I think, therefore I am” is the statement of an intellectual who underrates toothaches.
—Milan Kundera, 1990Every thought is, strictly speaking, an afterthought.
—Hannah Arendt, 1978Brain, n. An apparatus with which we think that we think.
—Ambrose Bierce, 1906What is the hardest task in the world? To think.
—Ralph Waldo Emerson, 1841A mind lively and at ease can do with seeing nothing, and can see nothing that does not answer.
—Jane Austen, 1815Sanity is madness put to good uses; waking life is a dream controlled.
—George Santayana, 1920The real question is not whether machines think but whether men do.
—B.F. Skinner, 1969Strength of mind is exercise, not rest.
—Alexander Pope, 1733