A scientific demonstration of immortality is declared to be an impossibility. But why go to science for such a demonstration? The question belongs to the domain of philosophy and religion. Science deals with physical forces and their relations; collects and inventories facts. Its mission is not to establish a universal metaphysic of things; that is philosophy's prerogative. All occult thinkers declare that life is from within, out. In other words life, or a spiritual principle, precedes organization. Science proceeds to investigate the phenomena of the universe in the opposite way from without, in; and pronounces life to be "a fortuitous collocation of atoms." Still, science has been the torch-bearer of the ages and has stripped the fungi of superstition from the tree of life. It has revealed to us the great laws of nature, though it has not explained them. We know that light, heat, and electricity are modes of motion; more than that we know not. Science is largely responsible for the materialistic philosophy in vogue to-day--a philosophy that sees no reason in the universe. A powerful wave of spiritual thought has set in, as if to counteract the ultra rationalism of the age. In the vanguard of the new order of things are Spiritualism and Theosophy. Spiritualism enters the list, and declares that the immortality of the soul is a demonstrable fact. It throws down the gauntlet of defiance to skepticism, saying: "Come, I will show you that there is an existence beyond the grave. Death is not a wall, but a door through which we pass into eternal life." Theosophy, too, has its occult phenomena to prove the indestructibility of soul-force. Both Spiritualism and Theosophy contain germs of truth, but both are tinctured with superstition. I purpose, if possible, to sift the wheat from the chaff. In investigating the phenomena of Spiritualism and Theosophy I will use the scientific as well as the philosophic method. Each will act, I hope, as corrective of the other. PART FIRST. SPIRITUALISM. I. DIVISIONS OF THE SUBJECT.