Balzac tells us that everything here below is the product of an ethereal substance, the common basis of various phenomena, known under the inappropriate names of electricity, heat, light, galvanic and magnetic fluid, etc., and that the universality of its transmutations constitutes what is vulgarly called matter. We cannot take up a book on physics (written with true scientific knowledge) in which we do not find evidence that its author acknowledges that there is, correctly speaking, but one force in nature. Radcliffe tells us that what is called electricity is only a one-sided aspect of a law which, when fully revealed, will be found to rule over organic as well as inorganic nature--a law to which the discoveries of science and the teachings of philosophy alike bear testimony,--a law which does not entomb life in matter, but which transfigures matter with a life which, when traced to its source, will prove only to be the effluence of the Divine life. Macvicar teaches that the nearer we ascend to the fountain-head of being and of action, the more magical must everything inevitably become; for that fountain-head is pure volition. And pure volition, as a cause is precisely what is meant by magic; for by magic is meant a mode of producing a phenomenon without mechanical appliances,--that is, without that seeming continuity of resisting parts and that leverage which satisfy our muscular sense and our imagination and bring the phenomenon into the category of what we call "the natural;" that is, the sphere of the elastic, the gravitating,--the sphere into which the vis inertiæ is alone admitted.