by agreement, and unity of Parts, there is composed Perceptions. CHAP. IV. Whether the Rational and Sensitive Parts have a Perception of each other. Some may ask the Question, _Whether the Rational and Sensitive, have Perception of each other?_ I answer: In my Opinion, they have. For, though the Rational and Sensitive Parts, be of two sorts; yet, both sorts have Self-motion; so that they are but as one, as, that they are both Corporeal Motions; and, had not the Sensitive Parts incumbrances, they would be, in a degree, as agil, and as free as the Rational. But, though each sort hath perception of each other, and some may have the like; yet they have not the same: for, not any Part can have another's Perception, or Knowledg; but, by reason the Rational and Sensitive, are both Corporeal Motions, there is a strong sympathy between those sorts, in one Conjunction, or Creature. Indeed, the Rational Parts are the Designing Parts; and the Sensitive, the Labouring Parts; and the Inanimate are as the Material Parts: not but all the three sorts are Material Parts; but the Inanimate, being not Self-moving, are the Burdensome Parts. CHAP. V. Of Thoughts, and the whole Mind of a Creature. AS for Thoughts, though they are several Corporeal Motions, or Self-moving Parts; yet, being united, by Conjunction in one Creature, into one whole Mind, cannot be perceived by some Parts of another Creature, nor by the same sort of Creature, as by another Man. But some may ask, _Whether the whole Mind of one Creature, as the whole Mind of one Man, may not perceive the whole Mind of another Man_? I answer, That if the Mind was not joyn'd and mix'd with the Sensitive and Inanimate Parts, and had not interior, as well as exterior Parts, the whole Mind of one Man, might perceive the whole Mind of another Man; but, that being not possible, one whole Mind cannot perceive another whole Mind: By which Observation we may perceive, there are no _Platonick Lovers_ in Nature. But some may ask, Whether the Sensitive Parts can perceive the Rational, in one and the same Creature? I answer, They do; for if they did not, it were impossible for the Sensitive Parts to execute the Rational Designs; so that, what the Mind designs, the Sensitive Body doth put in execution, as far as they have Power: But if, through Irregularities, the Body be sick, and weak, or hath some Infirmities, they cannot execute the Designs of the Mind. CHAP. VI. Whether the Mind of one Creature, can perceive the Mind of another Creature.