If telepathy is "the science of the soul's interchange with God--of the interchange of the thought of one soul with another;" if it "reveal that realm of consciousness where all God's thought is interpreted to the soul:" if "its vibration never dies out of the atmosphere of thought;" the discovery of this great law must indeed take precedence of that of any other achievement of the past century. The nature of Human Personality holds the secret of spiritual evolution. It doth not yet appear what man may be; but the increasing knowledge of his powers; the development of those heretofore latent and unrecognized, are combining to throw a new illumination on not only the aspects, but the purposes of life. Man is coming into enlightenment concerning the environment of the spiritual world as one more immediately controlling him, as well as one far more profound and significant, than the environment of matter and of ether. As things go, the chief emphasis has always been placed upon the material environment. Man has not infrequently been willing to sell his soul for a mess of pottage--his chief concern being, not the loss of his soul, but the gain of the pottage. He has been willing to exchange the entire devotion of all his energies for a finer and more resplendent quality of food, clothing, and shelter,--for a palace in which to live, for private cars and steam yachts in which to go about, and all the paraphernalia accessible to the multi-millionaire. But it is not all that these possessions typify which constitutes his most important environment. It is that degree of the spiritual world with which his own quality of spiritual life is fitted to ally itself. "The life of the organism consists in its power of interchanging energy with that of its environment," says Frederic W. H. Myers,--"of appropriating by its own action some fraction of that pre-existent and limitless power. We human beings exist, in the first place, in a world of matter," he continues, "whence we draw the obvious sustenance of our bodily functions. We exist also in a world of ether; that is to say, we are constructed to respond to a system of laws, ultimately continuous, no doubt, with the laws of matter, but affording a new, a generalized, a profounder conception of the Cosmos. On this environment our organic existence depends as absolutely as on the material environment, although less obviously,--but ... within, beyond the world of ether, as a still profounder, still more generalized aspect of the Cosmos, must lie, as I believe, the world of spiritual life."