_4thly, "What the substance or essence of that Being which is self-existent, or necessarily existing, is, we have no idea; neither is it at all possible for us to comprehend it."_ Dr. Clarke would perhaps have spoken more correctly if he had said his essence is impossible to be known: nevertheless, we shall readily concede that the essence of matter is incomprehensible, or at least that we conceive it very feebly by the manner in which we are affected by it; but without this we should be less able to conceive the Divinity, who would then be impervious on any side. Thus it must necessarily be concluded, that it is folly to argue upon it, since it is by matter alone we can have any knowledge of him; that is to say, by which we can assure ourselves of his existence,--by which we can at all guess at his qualities. In short we must conclude, that every thing related of the Divinity, either proves him material, or else proves the impossibility in which the human mind will always find itself, of conceiving any being different from matter; without extent, yet omnipresent; immaterial, yet acting upon matter; spiritual, yet producing matter; immutable, yet putting every thing in activity, &c. Indeed it must be allowed that the incomprehensibility of the Divinity does not distinguish him from matter; this will not be more easy of comprehension when we shall associate it with a being much less comprehensible than itself; we have some slender knowledge of it through some of its parts. We do not certainly know the essence of any being, if by that word we are to understand that which constitutes its peculiar nature. We only know matter by the sensations, the perceptions, the ideas which it furnishes; it is according to these that we judge it to be either favorable or unfavourable, following the particular disposition of our organs. But when a being does not act upon any part of our organic structure, it does not exist for us; we cannot, without exhibiting folly, without betraying our ignorance, without falling into obscurity, either speak of its nature, or assign its qualities; our senses are the only channel by which we could have formed the slightest idea of it; these not having received any impulse, we are, in point of fact, unacquainted with its existence. The incomprehensibility of the Divinity ought to convince man that it is a point at which he is bound to stop; indeed he is placed in a state of utter incapacity to proceed: this, however, would not suit with those speculators who are willing to reason upon him continually, to shew the depth of their learning,--to persuade the uninformed they understand that which is incomprehensible to all men; by which they expect to be able to submit him to their own views. Nevertheless, if the Divinity be incomprehensible, It would not be straining a point beyond its tension, to conclude that a priest, or metaphysician, did not comprehend him better than other men: it is not,