"The first philosophers, whether Chaldeans or Egyptians, said there must be something within us which produces our thought. That something must be very subtle: it is breath; it is fire, it is ether; it is a quintessence; it is a slender likeness; it is an intelechia; it is a number; it is harmony; lastly, according to the
divine Plato, it is a compound of the same and the other! It is atoms which think in us, said Epicurus after Democritus. But, my friend, how does an atom think? Acknowledge that thou knowest nothing of the matter." —VOLTAIRE.