"The foundation principle of substance is that law of the human mind by which every quality or mode of being is referred to a substance," or the consciousness of a cause for every effect. "In everything which we perceive or can imagine as existing, we distinguish two parts, qualities variable and multiplied; and a being one and identical; and these two are so united in thought that we can not separate them in our intelligence, nor think of qualities without a _substance_." So it is a self-evident or first truth, that there is a subjective or inner man which thinks, reflects and reasons, for memory recalls to us the many modes of our mind; its many qualities and conditions. What variety of mental conditions have we not experienced? These are all so many evidences of an internal _substance_ that we call spirit. That spirit is to be distinguished from thought as cause is from effect is evident; and also from matter lying in the accident or quality of body, is certain, from the fact of its being subject to such rapid and instantaneous changes of condition. Amidst all the different modes, qualities, or accidents of mind, we believe ourselves to be the same individual being; and this conviction is the result of that law of thought which always associates qualities with things. In the world around us phenomena, qualities or accidents are continually changing, but we believe that these, all, are produced by causes which _remain, as substances, the same_. And as we know ourselves to be the causes of our own acts, and to be able to change, within a moment, the modes of our own mind, so we believe the changes of matter, which take place _more slowly_, to be produced by causes which belong to the _substances of matter_. And underlying all causes, whether of the qualities of matter or mind, we conceive of one absolute cause, one substance, in itself persistent and upholding all things in nature. This substance we are pleased to call spirit; and this spirit we call God. To deny this is to strike down a grand law of thought, the foundation principle of substance, and make the testimony of our own consciousness A LIE! The inorganic forces, about which "unbelievers" have so much to say are altogether operative in the realm of _substance_; that is to say, they belong to the _invisible_. Organic and inorganic are the same as visible and invisible. We know matter by its qualities, and we know mind by its qualities. These two, in qualities or attributes, contrast with each other like life and death. One is extenuated and the other extended; one is invisible the other is visible. Of the existence of these substances and their laws we have evidence in conscious knowledge, in that we know that we have no control over the involuntary or sympathetic nervous system, and have the most perfect control over the voluntary nerves. The forces controlling are as different as these qualities themselves. If man is simply a material organism, why this