What is meant by the declaration that man is a compound of matter and spirit?--things which the orthodox assert have nothing in common with one another. Of the existence of what you call matter you are certain, because you and I, material beings, are here. Are you equally certain of the existence of mind, as an existence independent and separate from matter? and if you are, tell me why. Have you ever found it apart from matter? If so, when and where? Have you found that the mind has a separate and distinct existence? if so, under what circumstances? and tell me--you who define matter as unintelligent, passive, inert, and motionless--who talk of the _vis inertiæ_ of matter--tell me what you mean when you give these definitions to it? You find the universe, and this small portion of it on which we are, ceaselessly active. Why do you call it passive, except it be that you want courage to search for true knowledge as to the vast capabilities of existence, and, therefore, invent such names as God and Soul to account for all difficulties, and to hide your ignorance? What do you mean by passive and inert matter? You tell me of this world--part of a system--that system part of another--that of another--and point out to me the innumerable planets, the countless millions of worlds, in the universe. You, who tell me of the vast forces of the universe, what do you mean by telling me that that is motionless? What do you mean by yet pointing to the immeasurable universe and its incalculably mighty forces and affirming that they are incapable of every perceptible effect? You, without one fact on which to base your theory, strive to call into existence another existence which must be more vast, and which you allege produces this existence and gives its powers to it. Sir Isaac Newton says: "We are to admit no more causes of things than are sufficient to explain appearances." What effect is there which the forces of existence are incapable of producing?