Some think there must be a dirt world because they see it. In a way I seem to see my wife when I look at her picture; yet I only see a bit of paper irregularly faded. Likewise a shining light appears to be a complete thing in itself, whereas the sun, doubtless, is as dark as blackness. The light which the scientist studies is waves of energy, traveling at the rate of one hundred and eighty-six thousand miles per second, but that is not the sweet something that we experience as light. The light coming from the sun is not shiny until our sensations are added. And even then, it is our feelings that are brilliant because our nerves were struck by these rapid waves of energy. When we think we see a real face, it is only a shadow on the retina of the eye; which eye is only another bundle of energies, and not the substance that it appears to be. We live in a picture world, produced by God's energies beating upon other energies which He has intimately associated with our wills. We thank God for these pictures because they are the visible language of "loving intelligent wills," wills that in themselves are silent and invisible. Yet these wills are known in consciousness as a bit of final reality. They are like unto God who causes the vital energies that result in the pictures of a living, rational experience. Experience, therefore, with its inner consciousness and its outer symbol, or picture, is all we know. So when they would take us out of personal experience into a universal "substance" called spirit, they are offering to take us out of the known into the unknown; for they do not know whether there is any substance.