We assume that consciousness is organic, though we concede that it may be true that it is borrowed from a great pool of consciousness[1] out of which we all come. Consciousness IS organic because a blow on the head may abolish it as may drugs and disease, or a shifting of the blood supply as in emotion or fatigue in the form of sleep, etc. Where does it go to and how does it come back? The savage answered that question by building up the idea of a soul, a thing that might migrate, had an independent existence, took journeys in the form of dreams and lived and flourished after death. Most of these ideas still persist, perhaps as much through the fear of annihilation as anything else, but as to whether or not they are true this book does not concern itself. We have no proof of these matters, but we can prove that we can play on consciousness as we play on a piano, through the body and brain. A blow injures groups of nerve cells and consciousness disappears; when they recover, it returns. Where does any function go when structure is injured? We have practically the same kind of proof for the position of consciousness as a function of the brain and body that we have for gastric juice as a secretion of gastric cells. [1] Even if it were true that consciousness is the only reality, nobody really believes it in that nobody acts as if it were true. Conversely, everybody acts as if trees, rocks, and people were realities; as if fatigue, sickness, age, etc., affected consciousness. That is why, in this book, we are discarding as irrelevant the "ultimate" truth concerning consciousness. My humble belief is that the ultimate truth in this matter will never concern us because we shall never know it. However widely we spread the function of consciousness and its domain, we still leave a large field of activities untouched. And so we come to the conception of the subconsciousness. There are two prevailing sets of opinions concerning the subconscious.