at the top of the head. There are other dormant centres, but their
awakening is undesirable.

The shape of all the higher bodies as seen by the clairvoyant is ovoid, but
the matter composing them is not equally distributed throughout the egg. In
the midst of this ovoid is the physical body. The physical body strongly
attracts astral matter, and in its turn the astral matter strongly attracts
mental matter. Therefore by far the greater part of the matter of the
astral body is gathered within the physical frame; and the same is true of
the mental vehicle. If we see the astral body of a man in its own world,
apart from the physical body we shall still perceive the astral matter
aggregated in exactly the shape of the physical, although, as the matter is
more fluidic in its nature, what we see is a body built of dense mist, in
the midst of an ovoid of much finer mist. The same is true for the mental
body. Therefore, if in the astral or the mental world we should meet an
acquaintance, we should recognise him by his appearance just as instantly
as in the physical world.

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