Evolution is an established and generally accepted fact. No educated person now thinks of questioning it. It is settled beyond dispute that all things in the physical world have become what they are through a long, slow, gradual evolution and that organisms the most perfect in form and most complex in function have evolved from simpler ones. The age of miracle has passed and belief in miracle has passed so far as its relation to the material world is concerned. It is no longer necessary to have a belief in an anthropomorphic God, performing feats in defiance of natural law, in order to account for that which exists. Science has reduced the cosmos to comprehension and shown that, given nebulous physical matter, we can understand how the earth came into existence. But why should we stop with the application of the laws of evolution to material things? Only the outright materialist, who asserts that life is a product of matter, can logically do so, and so great an authority in the scientific world as Sir Oliver Lodge has asserted that there is no longer any such thing as scientific materialism.[B] Those who accept the idea of the existence of the soul at all must necessarily accept the idea of the evolution of the soul. How can consciousness possibly escape the laws that evolve the media for the expression of consciousness? There must be the evolution of mind as certainly as there is evolution of matter. The material and the spiritual, form and life, are inseparable. Indeed, scientific progress has now brought us to the point where matter, as such, practically disappears and we are face to face with the fact that matter is really but a manifestation of force. How, then, is it longer possible to speak of the soul and not accept the evolution of the soul? Psychology is no less a science than physiology. The phenomena of consciousness are as definitely studied as physical phenomena, and it is no more difficult to account for a myriad souls than to account for a million suns and their planets. The scientists who have taken the position that the universe has a spiritual side as well as a material side are among the most eminent and distinguished of the modern world. If evolution has produced the starry heavens from the material side it has likewise evolved the human souls of our world and others from the spiritual side. It is no more difficult to understand the one than the other.