“Every organized thing in this world, visible as well as invisible, has an element appropriate to itself. The fish lives and breathes in the water; the plant consumes carbonic acid, which for animals and men produces death; some beings are fitted for rarefied strata of air, others exist only in the densest. Life, to some, is dependent on sunlight, to others, upon darkness; and so the wise economy of nature adapts to each existing condition some living form.
These analogies warrant the conclusion that, not only is there no unoccupied portion of universal nature, but also that for each thing that has life, special conditions are furnished, and, being furnished, they are necessary.
Now, assuming that there is an invisible side to the universe, the fixed habit of nature warrants the conclusion that this half is occupied, like the other half; and that each group of its occupants is supplied with the indispensable conditions of existence.
It is as illogical to imagine that identical conditions are furnished to all, as it would be to maintain such a theory respecting the inhabitants of the domain of visible nature. That there are spirits implies that there is a diversity of spirits; for men differ, and human spirits are but disembodied men.
To say that all spirits are alike, or fitted to the same atmosphere, or possessed of like powers, or governed by the same attractions – electric, magnetic, odic, astral, it matters not which – is as absurd as though one should say that all planets have the same nature, or that all animals are amphibious, or all men can be nourished on the same food.
It accords with reason to suppose that the grossest natures among the spirits will sink to the lowest depths of the spiritual atmosphere – in other words, be found nearest to the earth. Inversely, the purest would be farthest away.
In what, were we to coin a word, we should call the Psychomatics of Occultism, it is as unwarrantable to assume that either of these grades of spirits can occupy the place, or subsist in the conditions, of the other, as in hydraulics it would be to expect that two liquids of different densities could exchange their markings on the scale of Beaume’s hydrometer.”
H. P. Blavatsky