The Ego.

One of the best proofs that there is an Ego, a true Field of Consciousness, is the fact already mentioned, that a state of consciousness is never exactly reproduced, though you should live a hundred years, and pass through milliards and milliards. In an active day, how many states and substates there are; it would be impossible to have cells enough for all. This will help you to understand why some mental states and abstract things follow the Ego into Devachan, and why others merely scatter in space. That which touches the Entity has an affinity for it, as a noble action, is immortal and goes with it into Devachan, forming part and parcel of the biography of the personality which is disintegrating. A lofty emotion runs through the seven stages, and touches the Ego, the mind that plays its tunes in the mind-cells. We can analyze the work of consciousness and describe it; but we cannot define consciousness unless we postulate a Subject.