The ordinarily decent person has in his astral body but little of the matter of its lowest portion--by no means enough to construct a heavy shell.

The redistribution puts on the outside of the body its densest matter; in the ordinary man this is usually matter of the sixth subdivision, mixed with a little of the seventh, and so he finds himself viewing the counterpart of the physical world.
The ego is steadily withdrawing into himself, and as he withdraws he leaves behind him level after level of this astral matter.

So the length of the man's detention in any section of the astral world is precisely in proportion to the amount of its matter which is found in his astral body, and that in turn depends upon the life he has lived, the desires he has indulged, and the class of matter which by so doing he has attracted towards him and built into himself.

Finding himself then in the sixth section, still hovering about the places and persons with which he was most closely connected while on earth, the average man, as time passes on, finds the earthly surroundings gradually growing dimmer and becoming of less and less importance to him, and he tends more and more to mould his entourage into agreement with the more persistent of his thoughts.

By the time that he reaches the third level he finds that this characteristic has entirely superseded the vision of the realities of the astral world.
The second subdivision is a shade less material than the third, for if the latter is the summerland of the spiritualists, the former is the material heaven of the more ignorantly orthodox; while the first or highest level appears to be the special home of those who during life have devoted themselves to materialistic but intellectual pursuits, following them not for the sake of benefiting their fellow men, but either from motives of selfish ambition or simply for the sake of intellectual exercise.