So also with that intelligence which is the guiding light in our lives. It may illumine our pathway, or it may flash and fitfully glare, with the shadows, rendering our pathway obscure and uncertain, illusory and deceitful, or dangerous and fearful. The soul is in the body; and this light of intelligence is in the soul, its center, its very essence. All else in us, and round about us, is diversity and multiplicity. This light of intelligence in us is _One_ and unchanging. Our experience in life, however varied and diversified, is co-ordinated and unified by this Intelligence in us. It is that which puts all our experiences together and views them through a single lens. It stands by itself alone, and all else pays tribute to it. It is the pronoun "I" and it stands for, speaks and acts for, all else in us. It is not alone the only _unity_ in us, but it is that which unifies all the rest, uses the "possessive case," and may subordinate all else in us to its Will. Does it, then, do violence to common sense and hourly experience, or is it any stretch of the imagination to speak of this unity as an entity, and call it the human soul? If we live after the change called death, in a spiritual world, in place of the physical we now inhabit, and with a spiritual or refined body to correspond with that plane of refined or etherialized substance, the Individual Intelligence must function in that body and on that plane as it does now in the physical body on the physical plane. Either something very like this takes place, or we cease to exist as a self-conscious individual intelligence. There must remain and continue man's self-conscious identity. Furthermore, if this be true, the _real nature_ of this individual intelligence we call the _Self_, in the last analysis, is likely to be as much a mystery as ever. We may know _who we are_ without knowing _what it is_. Now the composite nature of man, as we know it, not only justifies all these analogies, but seems to show that the modulus, the germ at least, of the spiritual body exists now within the physical; that it does not disintegrate when the physical body dies, but separates and coheres more closely than ever; and is still inhabited or possessed by the individual intelligence. Moreover, it has often been seen by clairvoyants at the time of death, thus verifying the Biblical declaration, "there is a natural (physical) body, and there is a spiritual body." The composite structures of man's organism above referred to are well known. They are called "systems." The bony or Osseous system, the muscular system, the circulatory system, the lymphatic system, and the two nervous systems, serve as illustrations of the composite nature of man. All of these "systems" more or less inter-penetrate and diffuse each other.