This, then, is the true constitution of man. In the first place he is a Monad, a Spark of the Divine. Of that Monad the ego is a partial expression, formed in order that he may enter evolution, and may return to the Monad with joy, bringing his sheaves with him in the shape of qualities developed by garnered experience. The ego in his turn puts down part of himself for the same purpose into lower worlds, and we call that part a personality, because the Latin word _persona_ means a mask, and this personality is the mask which the ego puts upon himself when he manifests in worlds lower than his own. Just as the ego is a small part and an imperfect expression of the Monad, so is the personality a small part and an imperfect expression of the ego; so that what we usually think of as the man is only in truth a fragment of a fragment. The personality wears three bodies or vehicles, the mental, the astral and the physical. While the man is what we call alive and awake on the physical earth he is limited by his physical body, for he uses the astral and mental bodies only as bridges to connect himself with his lowest vehicle. One of the limitations of the physical body is that it quickly becomes fatigued and needs periodical rest. Each night the man leaves it to sleep, and withdraws into his astral vehicle, which does not become fatigued, and therefore needs no sleep. During this sleep of the physical body the man is free to move about in the astral world; but the extent to which he does this depends upon his development. The primitive savage usually does not move more than a few miles away from his sleeping physical form--often not as much as that; and he has only the vaguest consciousness. The educated man is generally able to travel in his astral vehicle wherever he will, and has much more consciousness in the astral world, though he has not often the faculty of bringing into his waking life any memory of what he has seen and done while his physical body was asleep. Sometimes he does remember some incident which he has seen, some experience which he has had, and then he calls it a vivid dream. More often his recollections are hopelessly entangled with vague memories of waking life, and with impressions made from without upon the etheric part of his brain. Thus we arrive at the confused and often absurd dreams of ordinary life. The developed man becomes as fully conscious and active in the astral world as in the physical, and brings through into the latter full remembrance of what he has been doing in the former--that is, he has a continuous life without any loss of consciousness throughout the whole twenty-four hours, and thus throughout the whole of his physical life, and even through death itself. Chapter VI AFTER DEATH