Some may ask the reason, _Why one Creature, as Man, cannot perceive the Thoughts of another Man, as well as he perceives his exterior Sensitive Parts?_ I answer, That the Rational Parts of one Man, perceive as much of the Rational Parts of another Man, as the Sensitive Parts of that Man doth of the Sensitive Parts of the other Man; that is, as much as is presented to his Perception: for, all Creatures, and every part and particle, have those three sorts of Matter; and therefore, every part of a Creature is perceiving, and perceived. But, by reason all Creatures are composed of Parts, (_viz._ both of the Rational and Sensitive) all Perceptions are in parts, as well the Rational, as the Sensitive Perception: yet, neither the Rational, nor the Sensitive, can perceive all the Interior Parts or Corporeal Motions, unless they were presented to their perception: Neither can one Part know the Knowledg and Perception of another Part: but, what Parts of one Creature are subject to the perception of another Creature, those are perceived. CHAP. VII. Of Perception, and Conception. Although the Exterior Parts of one Creature, can but perceive the Exterior Parts of another Creature; yet, the Rational can make Conceptions of the Interior Parts, but not Perception: for, neither the Sense, nor Reason, can perceive what is not present, but by rote, as after the manner of Conceptions, or Remembrances, as I shall in my following Chapters declare: So that, the Exterior Rational Parts, that are with the Exterior Sensitive Parts of an Object, are as much perceived, the one, as the other: but, those Exterior Parts of an Object, not moving in particular Parties, as in the whole Creature, is the cause that some Parts of one Creature, cannot perceive the whole Composition or Frame of another Creature: that is, some of the Rational Parts of one Creature, cannot perceive the whole Mind of another Creature. The like of the Sensitive Parts. CHAP. VIII. Of Human Suppositions. Although Nature hath an Infinite Knowledg and Perception; yet, being a Body, and therefore divisible and compoundable; and having, also, Self-motion, to divide and compound her Infinite Parts, after infinite several manners; is the reason that her finite Parts, or particular Creatures, cannot have a general or infinite Knowledg, being limited, by being finite, to finite Perceptions, or perceptive Knowledg; which is the cause of _Suppositions_, or Imaginations, concerning Forrein Objects: As for example, A Man can but perceive the Exterior Parts of another Man, or any other Creature, that is subject to Human Perception; yet, his Rational Parts may suppose, or presuppose, what another Man thinks, or what he will act: and for other Creatures, a Man may suppose or imagine what the innate nature of such a Vegetable, or Mineral, or Element is; and may imagine or suppose the Moon to be another World, and that all the fixed Starrs are Sunns; which Suppositions, Man names _Conjectures_.