to him he said_--_but he answered_--the same form St. _Luke_ useth to signifie the appearance of _Moses_ and _Elias_, in the transfiguration, _And behold there talked with him two men_: for what follows, ver. 31, _who appeared_ is used to signifie (not their appearance, but) the manner of their appearance _in great Glory_. But you'l urge that 'tis very easie to be understood, that _Moses_ and _Elias_ did appear, because they had human bodies; but that it is unintelligible to you, how the Devil being a Spirit can appear, a Spirit, _i. e._ a substance void of all dimensions; therefore the words in [67] the History must not be taken in a literal Sense. Do not mistake; tho some Philosophers are of opinion (which whether true or false, is all one to our present Argument) that a Spirits substance is extended, and hath besides length, breadth and depth, a fourth dimension, _viz._ essential spissitude; yet the same do not say, that pure substance is perceptible by our bodily senses; on the contrary, they tell us, that Spirits are cloathed with vehicles, _i. e._ they are united to certain portions of matter, which they inform, move and actuate. Now this we must not reject as impossible, because we cannot comprehend the formal reason, how a Spirit acts upon matter: For who can give the Reason, that upon the Volition of the human Soul, the Hand should be lifted up, or any ways moved? for to say the Contraction of the Muscles is the Mechanick cause of voluntary motion, is not to solve the Question which recurs, why upon Volition should that Contraction ensue which causes that motion? all that I know the wisest Man ever said upon this head, is, that it is the will of the Creator; who hath ordered such a species of thinking Creatures, by a Catholick Law to be united to such portions of matter, so and so disposed, or, if you will in the vulgar Phrase, to Organiz'd bodies, and that there should be between them and the several bodies, they are united to, a mutual re-action and passion: Now you see how little we know of the reason, of that which is most near to us, and most certain, _viz._ The Souls informing the Body, yet you would think it a bad Argument, if one should, as some have done, include from this our Ignorance, that there was nothing in us but matter, it is no otherways to deny a Spirits acting a Vehicle. The plainest and most certain things when denied are hardest to be proved, therefore the Axiom saith well, _contra principa, &c._ There are some certain truths which are rather to be explained to young beginners than proved, upon which yet all Science is built, as every whole is more than his part, and of this sort I take these two following. 1. That there are two substances, _Corpus & Mens_, Body and Spirit, altogether different, for the Ideas we have of them are quite distinct. 2. That a Spirit can Actuate, Animate, or inform a certain portion of matter, and be united to it: from whence it is very evident, that the Devil united to a