We live on the manasic--pranic--etheric globe on precisely the
same terms that we live on this of prakriti, and the problems of
the three are equally open to us.

"If there are any who care to follow up the line of thought I
have opened, who care for the questions that interest us of the
East, I will talk as long as they care to listen, provided they
will not ask for knowledge that will give them power over others,
which cannot fail to be used for evil."

This is but a glimpse of Hindu physics, yet it has helped us in
the metaphysics. We now understand the chain of globes--in
part. The earth is fourfold. As each atom of the earth is
fourfold, so their aggregations give us prakritic earth, an
etheric earth, a pranic earth, and a manasic earth--in
coadunition and not like the skin of an onion. They are separate
and distinct globes, each on its own plane. It is four down and
three up for the Angel entering matter, whether from the outmost
boundary of manasic matter, or the surface of the earth, or the
cover of a baseball. The "chain of globes" in the Secret
Doctrine represents the unity of the material universe.

The three-fold nature of the astral model is revealed, and the
unity of all prakritic things. But more than that, to many
minds, will be the explanation it gives of why there are but four
planes of vibration in matter; that the highest form of
development in prakriti shows only four elements, prakriti or
body, sensation or force, life, and mind, and that these last
three, present in all things in esse, become present in posse
when they work together harmonically.