Professor George Bush writes:--"The progress of scientific research, at the present day, has distinguished itself not less by the wideness of the field over which its triumphs have spread, than by the soundness and certainty of the inductions by which it is sustained. It is equally indisputable that we are approximating the true philosophy which underlies the enlarged and enlarging spiritual experiences and phenomena of the current age. That this philosophy, when reached, will conduct us into the realm of the spiritual as the true region of causes, and disclose new and unthought-of relations between the world of matter and of mind, is doubtless a very reasonable anticipation, and one that even now is widely, though vaguely, entertained." The Egyptians worshipped Ra, their name for the sun, and Ammon, the emblem of a mysterious power concealed from human perception. The Supreme Being is the grand central spiritual sun, the source and centre of all life, "whose revelation is traced in imperishable figures of universal harmony on the face of Cosmos." "The outward visible world is but the clothing of the invisible," wrote Coleridge. "The whole world process, in its content," says von Hartmann, "is only a logical process; but in its existence a continued act of will." Lilly continues, "That is what physical law means. Reason and Will are inseparably united in the universe, as they are in idea. If we will anything, it is for some reason. In contemplating the structure of the universe, we cannot resist the conclusion that the whole is founded upon a distinct idea."