“And now what is the scientific doctrine of the great theme of immortality? Is there any hope for man? In one word, No. For any such hope, if men must continue to indulge in it after hearing the scientific arguments, they must go elsewhere -- to the theologian, the metaphysician, the mystic, the poet. These men, habitually dwelling in their several spheres of illusion and unreality, may find suggestions of the fantasy, which they persuade themselves are arguments in favor of a future life; the man of science, for his part, and the positive thinker, building on science, consider no proposition more certain than that the soul is mortal as well as the body which supported it, and of which it was merely the final flower and product.”