8th density = 1st density in the next octave?

[Rolci]

another point to remember is that even an octave's parameters are not set in stone and are subject to modifications. As experience is used to distil knowledge, new rules are set up to facilitate higher degrees of knowledge being extracted. Solar and galactic logoi are in instant connection and communication (as are EONS) and once one "realizes" something the rest are instantly aware. An example is the development of the concept of the veil, which did not exist at the beginning of this creation but was later developed in galactic cores where life and consciousness first emerged.

A very great deal of creation was manifested without the use of the concepts
involved in consciousness, as you know it. The creation itself is a form of
consciousness which is unified, the Logos being the one great heart of
creation. The process of evolution through this period, which may be seen
to be timeless, is most valuable to take into consideration, for it is against
the background of this essential unity of the fabric of creation that we find
the ultimate development of the Logoi which chose to use that portion of
the harvested consciousness of the Creator to move forward with the process
of knowledge of self. As it had been found to be efficient to use the various
densities, which are fixed in each octave, in order to create conditions in
which self-conscious sub-Logoi could exist, this was carried out throughout
the growing flower-strewn field, as your simile suggests, of the one infinite
creation.
The first beings of mind, body, and spirit were not complex. The experience
of mind/body/spirits at the beginning of this octave of experience was
singular. There was no third-density forgetting. There was no veil. The
lessons of third density are predestined by the very nature of the vibratory
rates experienced during this particular density and by the nature of the
quantum jump to the vibratory experiences of fourth density.

more in book 4 session 82. furthermore, from session 81:

there must have been some type of communication
throughout the octave so that, when the first experiment became effective,
knowledge of this spread rapidly through the octave and was picked up by
other budding galactic spirals, you might say. Is this correct?
Ra: I am Ra. This is correct. To be aware of the nature of this
communication is to be aware of the nature of the Logos. Much of what
you call creation has never separated from the One Logos of this octave and
resides within the one infinite Creator. Communication in such an
environment is the communication of cells of the body. That which is
learned by one is known to all. The sub-Logoi, then, have been in the
position of refining the discoveries of what might be called the earlier sub-
Logoi.

And further food for thought from session 78:

I am guessing that in our Milky Way Galaxy (the major galaxy with billions
of stars) that the progress of evolution was from the center outward toward
the rim and that in the early evolution of this galaxy the first distortion was
not extended down past the sub-Logos simply because it was not thought of
or conceived of and that this extension of the first distortion, which created
polarization, was something that occurred in what we would call a later time
as the evolution progressed outward from the center of the galaxy. Am I in
any way correct in this statement?
Ra: I am Ra. You are correct.