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The human brain.

The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals—only a few invertebrates such as sponges, jellyfish, adult sea squirts and starfish do not have a brain, even if diffuse neural tissue is present. It is located in the head, usually close to the primary sensory organs for such senses as vision, g, balance, taste, and smell.


  • Aristotle 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, The Decline and Fall of Practically Everybody, 1950
  • Brain, n. An apparatus with which we think we think.
  • Do we trivialize a sublime feeling if we appreciate its dependence on the brain? Not in the least. Its significance does not depend on its being a soul state or a brain state...Humility bids us to take ourselves as we are; we do not have to be cosmically significant to be genuinely significant.
  • We do have an organ for understanding and recognizing moral facts. It is called the brain.
  • If the human brain were so simple that we could understand it, we would be so simple that we couldn't.
    • Emerson M. Pugh, As quoted in The Biological Origin of Human Values
  • The brain is a mystery; it has been and still will be. How does the brain produce thoughts? That is the central question and we have still no answer to it.
  • A hidden spark of the dream sleeps in the forest and waits in the celestial spheres of the brain.
    • Dejan Stojanovic in Circling, ”In Search of Spark,” Sequence: “A Warden with No Keys” (1993)

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