"Within each density there are seven sub-densities"

[zenmaster]

It would seem to me from the above, that the last sub-density in 1D is that of awareness or consciousness of being, which is the prerequisite for entry into 2D (note that Ra even describes this as "living" in space/time). Similarly, the first sub-density would be one of random (and timeless) movement progressing into one of molding and forming of the the earth and water by fire and wind, which I would take to be the second sub-density.
Although the third through sixth sub-densities may have clear delineations, they are not directly alluded to by Ra, they would seem to represent various steps of greater order leading to awareness.

I suspect that this is not the type of discussion that you were after, though. Does it help in any way better elucidate your question?

Thanks for the excerpts. They do provide helpful context! I suppose one would have to understand how the 4 elements may work together in a dynamic of increasingly complexity. We should be able to (intuitively as least) see how each stage culminates to provide the groundwork for the subsequent stage.

Was reading a website that attributed the 4 elements to some psychological functions (which presumably have 1st-density analogs):

Air = Thought, Fire = Desire, Water = Emotions, Earth = Stability

Perhaps also, using Jungian typology - Air = Thinking, Fire = Intuition, Water = Feeling, Earth = Sensation ?

Jolande Jacobi, one of Jung's followers, mentioned that Jung intended his four functions as an explanation, not only of psychological behavior, but also in some way of the physical nature of space and time.

So in space/time or time/space terminology, we could have:

Air (Thinking) = space from standpoint space/time
attributes: directed, objective, causal, valuing, yang, grounded, static, linear

Water (Feeling) = time from standpoint of space/time
attributes: undirected, subjective, acausal, valuing, yin, ungrounded, dynamic, circular

Earth (Sensation) = space from standpoint of time/space
attributes: undirected, objective, causal, non-valuing, yang, grounded, static

Intuition (Fire) = time from standpoint of time/space
attributes: directed, subjective, acausal, non-valuing, yin, ungrounded, dynamic

It should be understood that just as space has no meaning without time and vice versa, in dynamic terms, thinking, sensation, feeling and intuition mutually interact with each other (and have no meaning in the absence of each other).