Consequently at any given moment it is practically certain that particles of all varieties will be represented on the surface of his astral body, and that therefore when he is using his astral body during sleep he will be able to "see" by its means any astral object which approaches him.
After death, if he has allowed the rearrangement to be made (as from ignorance, all ordinary persons do) his condition in this respect will be different.

Having on the surface of his astral body only the lowest and grossest particles, he can receive impressions only from corresponding particles outside; so that instead of seeing the whole of the astral world about him, he will see only one-seventh of it, and that the densest and most impure.

The vibrations of this heavier matter are the expressions only of objectionable feelings and emotions, and of the least refined class of astral entities.

Therefore it emerges that a man in this condition can see only the undesirable inhabitants of the astral world, and can feel only its most unpleasant and vulgar influences.
He is surrounded by other men, whose astral bodies are probably of quite ordinary character; but since he can see and feel only that which is lowest and coarsest in them, they appear to him to be monsters of vice with no redeeming features.

Even his friends seem not at all what they used to be, because he is now incapable of appreciating any of their better qualities.
Under these circumstances it is little wonder that he considers the astral world a hell; yet the fault is in no way with the astral world, but with himself--first, for allowing within himself so much of that cruder type of matter, and, secondly, for letting that vague astral consciousness dominate him and dispose it in that particular way.
The man who has studied these matters declines absolutely to yield to the pressure during life or to permit the rearrangement after death, and consequently he retains his power of seeing the astral world as a whole, and not merely the cruder and baser part of it.
The astral world has many points in common with the physical; just like the physical, it presents different appearances to different people, and even to the same person at different periods of his career.