The Sensitive Organs are only ignorant of each other, as they are of Forrein Objects: for, as all the Parts of Forrein Objects, are not subject to one Sensitive Organ; so all the Sensitive Organs are not subject to each Sensitive Organ of a Human Creature: yet, in the perceptive Actions of Forrein Objects, they do so agree, that they make an united Knowledg: Thus we may be particularly ignorant one way, and yet have a general Knowledg another way. CHAP. XII. Of Human Perception, or Defects of a Human Creature. It is not the great quantity of Brain, that makes a Man wise; nor a little quantity, that makes a Man foolish: but, the irregular, or regular Rational Corporeal Motions of the Head, Heart, and the rest of the Parts, that causes dull Understandings, short Memories, weak Judgments, violent Passions, extravagant Imaginations, wild Fancies, and the like. The same must be said of the Sensitive Irregular Corporeal Motions, which make Weakness, Pain, Sickness, disordered Appetites, and perturbed Perceptions, and the like: for, Nature poysing her Actions by Opposites, there must needs be Irregularities, as well as Regularities; which is the cause that seldom any Creature is so exact, but there is some Exception. But, when the Sensitive and Rational Corporeal Motions are regular, and move sympathetically, then the Body is healthful and strong, the Mind in peace and quiet, understands well, and is judicious: and, in short, there are perfect Perceptions, proper Digestions, easie Respirations, regular Passions, temperate Appetites. But when the Rational Corporeal Motions are curious in their change of Actions, there are subtile Conceptions, and elevated Fancies: and when the Sensitive Corporeal Motions move with curiosity, (as I may say) then there are perfect Senses, exact Proportions, equal Temperaments; and that, Man calls _Beauty_. CHAP. XIII. Of Natural FOOLS.