within the Infinite Mind of THE ALL.

The Hermetists sub-divide each of the Three Great Planes into Seven
Minor Planes, and each of these latter are also sub-divided into seven
sub-planes, all divisions being more or less arbitrary, shading into
each other, and adopted merely for convenience of scientific study and
thought.

The Great Physical Plane, and its Seven Minor Planes, is that division
of the phenomena of the Universe which includes all that relates to
physics, or material things, forces, and manifestations. It includes all
forms of that which we call Matter, and all forms of that which we call
Energy or Force. But you must remember that the Hermetic Philosophy does
not recognize Matter as a thing in itself, or as having a separate
existence even in the Mind of THE ALL. The Teachings are that Matter is
but a form of Energy--.that is, Energy at a low rate of vibrations of a
certain kind. And accordingly the Hermetists classify Matter under the
head of Energy, and give to it three of the Seven Minor Planes of the
Great Physical Plane.

These Seven Minor Physical Planes are as follows:

1. The Plane of Matter (A)
2. The Plane of Matter (B)
3. The Plane of Matter (C)
4. The Plane of Ethereal Substance
5. The Plane of Energy (A)
6. The Plane of Energy (B)
7. The Plane of Energy (C)