Your _Author_ in the continuation of his discourse concerning the Immaterial Soul of Man, demonstrating, that her seat is not bound up in a certain place of the body, but that she pervades all the body and every part thereof, takes, amongst the rest, an argument from Passions and Sympathies: _Moreover_, says he,[1] _Passions and Sympathies, in my judgment, are more easily to be resolved into this hypothesis of the Soul's pervading the whole Body, then in restraining its essential presence to one part thereof.--But it is evident that they arise in us against both our will and appetite; For who would bear the tortures of fears and jelousies, if he could avoid it?_ Concerning Passions, _Madam_, I have given my opinion at large in my Book of Philosophy, and am of your _Authors_ mind, that Passions are made in the Heart, but not by an Immaterial spirit, but by the Rational soul which is material; and there is no doubt, but that many Passions, as Fear, Jealousie &c. arise against our will and appetite; for so may forreign Nations invade any Kingdom without the will or desire of the Inhabitants, and yet they are corporeal men: The same may be said of Passions; and several parts of matter may invade each other, whereof one may be afraid of the other, yet all this is but according as corporeal matter moves, either Generally, or Particularly: Generally, that is, when many parts of Matter unite or joyn together, having the like appetites, wills, designs; as we may observe, that there are general agreements amongst several parts, in Plagues, as well as Wars, which Plagues are not onely amongst Men, but amongst Beasts; and sometimes but in one sort of animals, as a general Rot amongst Sheep, a general Mange amongst Dogs, a general Farcy amongst Horses, a general Plague amongst Men; all which could not be without a general Infection, one part infecting another, or rather one part imitating the motions of the other, that is next adjoyning to it; for such infections come by the neer adhesion of parts, as is observable, which immaterial and individable natural Spirits could not effect; that is, to make such a general infection in so many several parts of so many several Creatures, to the Creatures dissolution: Also there will be several Invasions at one time, as Plague, and War, amongst neighbouring and adjoining Creatures or Parts. But this is to be observed, That the sensitive corporeal motions make all diseases, and not the Rational, although the Rational are many times the occasion, that the sensitive do move into such or such a disease; for all those that are sick by conceit, their sicknesses are caused by the rational corporeal motions. But being loth to make tedious repetitions hereof, having discoursed of diseases, and passions in my mentioned Book of _Philosophy_, I will refer you thither, and rest, Madam, _Your Faithful Friend_ _and Servant._ [1] _Immort. of the Soul. Book_ 2. _c._ 10 XXVIII. _MADAM,_