"Whatever has existed from eternity, independent and without any external cause, must be self-existent. Whatever is self-existent must exist necessarily, by an absolute necessity in the nature of the thing. This is also self-evident. It follows, therefore, that unless the material world exist necessarily, by an absolute necessity in its own nature, so that it must be a contradiction to suppose it not to exist, it cannot be independent and eternal. In order to disprove this absolute necessity, he [Dr. Clarke] reasoned thus: If matter be supposed to exist necessarily, then in that necessary existence is included the power of gravitation, or it is not. If not, then in a world merely material, and in which no intelligent being presides, there never could have been any motion. But if the power of gravitation be included in the pretended necessary existence of matter, then it follows necessarily, that there must be a vacuum; it follows, likewise, that matter is not a necessary being. For if a vacuum actually be, then it is plainly more than possible for matter not to be." Is it not passing strange that such a dreamy argumentation as this--and it is a fair sample of Dr. Clarke's extended work on the existence of the Deity--should have been regarded as sound logic by many of the acutest minds, and that a majority even of the ablest metaphysicians, up almost to the present day, should have felt satisfied with it? A few minds, indeed, long ago perceived its fallacy, among whom was Alexander Pope, who thus sarcastically describes it:-- "Be that my task, replies a gloomy Clarke, Sworn foe to mystery, yet divinely dark. Let others creep by timid steps and slow, On plain experience lay foundation low, By common sense to common notions bred, And last to nature's cause through nature led, All-seeing in thy mists, we need no guide, Mother of arrogance, and source of pride! We nobly take the high _priori_ road, And reason downward till we doubt of God." _Dunciad_, Book IV. It is impossible, on this occasion, to go into a formal refutation of this famous argument. But this is unnecessary; since, as Dr. Chalmers says, it "has fallen into utter disesteem and desuetude." Indeed, the language of Dr. Thomas Brown on this subject is not too severe, when he says, that he "conceives the abstract arguments that have been adduced to show that it is impossible for matter to have existed from eternity, by reasoning on what has been termed necessary existence, and the incompatibility of this necessary existence with the qualities of matter, to be relics of the mere verbal logic of the schools, as little capable of producing conviction as any of the wildest and most absurd of the technical scholastic reasonings on the properties, or supposed properties, of entity and nonentity."