Ordinarily when one sleeps a complex phenomenon happens. The waking consciousness is no longer there, or all that has been withdrawn within into the inner realms of which we are not aware when we are awake, though they exist; for then all that is put behind a veil by the waking mind and nothing remains except the surface self and the outward world — much as the veil of the sunlight hides from us the vast worlds of the stars that are behind it. Sleep is a going inward in which the surface self and the outside world are put away from our sense and vision. But in ordinary sleep we do not become aware of the world within; the being seems submerged in a deep subconscience. On the surface of this subconscience floats an obscure layer in which dreams take place, as it seems to us, but, more correctly it may be said, are recorded. When we go very deeply asleep, we have what appears to us a dreamless slumber; but in fact dreams are going on, but they are either too deep down to reach the recording surface or are forgotten, all recollection of their having existed even is wiped out in the transition to the waking consciousness.