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Date: 1664

"The parts of the blood which penetrate as far as the brain serve not only to nourish and sustain its substance, but also and primarily to produce in it a certain very fine wind, or rather a very lively and pure flame, which is called the animal spirits."

— Descartes, René (1596-1650)

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Date: 1694

"As Fire under Ashes, nor the Sun obscured from our sight by thick Clouds, afford not their full lustre, so the Soul overwhelmed in moist or faulty matter, is darkned, and Reason thereby overclouded"

— Aristotle [pseud.]

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The Mind is a Metaphor is authored by Brad Pasanek, Assistant Professor of English, University of Virginia.