Higher Self question

[Avocado]

1st Density: Mineral kingdom
2nd Density: Plant & lower animal kingdom
3rd Density: Higher animal & lower human
4th Density Low: Astral, lower emotional realms
4th Density High: Etheric, higher mental realms
5th Density Low: Causal, creative realms
5th Density High: Soul (last level of individuality)
6th Density: Oversoul (social memory complex)
7th Density: Master oversoul, atmic plane
8th Density: Avatar planes, celestial heavens
9th Density: Christ planes, Buddhic planes, lower God worlds
10th Density: Higher God realms
11th Density: Universal realms
12th Density: The source; the mystery, the Tao
13th and beyond: The void, unmanifested creation

Where did the density definitions beyond 7D come from?

This is really cool thanks for sharing pickle... but I'm a bit confused. My understanding of what's described in the Ra materiel is that 1D and 8D are the same, or they match. When I look at this list I would match up 1D and 12D. I see a holographic fractal (mineral) matched up with source. So the present moment progresses from mineral to the void, then back to the source/mineral where that mysterious thing happens and the fun begins again. I feel like this description shared by Pickle and the one given by Ra are possibly two ways of saying the same thing where some of the latter densities of these two different descriptions kind of fit together. (God I love this stuff!) The most beneficial knowledge of the densities for us as positive 3Ders would be the densities closest to us, so Ra could have been less descriptive of higher densities for this simple reason. Maybe I'm over analyzing this thing but it really through me off into a thought jumble.

I've always felt some friction when pondering oneness, especially before finding the LOO. I think that has something to do with the rational mind and the fact that this is not a realm of understanding. I still feel a little friction but have started to chill out thanks to faith. Maybe the feeling I experience is just my emotional experience of the law of confusion.

Anyway, this is just my attempt to alleviate some confusion.
If what I said doesn't make sense I will try to elaborate. I'd love to hear your understandings/thoughts/feelings