I can tell where did I get with understanding of 7D and existence itself at the moment. ( I see others have similar take on that)
At this point, based on what said by C's, some lecturers and one Yogi, who explains how all of Creation exist and manifest.
He said that in Tantric tradition they used to see it as a cycle. (He showed it on a picture, like from infinite consciousness some part separated and goes to 1.2.3D and then back again)
If I combine it with what C's said, (mine interpretation) it gives me some clues.
Like the One (God) (All of us, and we are the One) smth like that, goes in cycles, so to say starting from 7th D point and spreads into 1,2,3,4,5,6.7D (maybe some part stays in 7d , some are arrived/arriving/leaving as it have been, will be, is going on, etc.)
Maybe an example can be made with water. There are seas, oceans, rivers, lakes, etc.
Imagine God as water. But it can be limited by the surroundings, like 3d beings is lake (as C's said that humanity altogether is a big soul), Oceans let it be C's, 6th density. You can speculate on that.
It looks like God is everywhere, but in different forms, because of the limited environment, e.g. the one we are living in. Like we are all limited edition 7D particles . )
And All That together 1.2.3.4.5.6.7D, are also God, like an organism, and at the same time there is 7D point (where there are no limits).
I don't know how to explain it by words, but in some extend looks like it staters settling down in my head. (It sort of on the feelings level also)
So I made a checkpoint here.
Why it is happening?, taking to account that it is natural procces, I guess it is boring there, in 7d.
You have everything. For example you want a nice piece of bacon, you can have it at once.
Why do you want it - in order to feel satisfied, so you just can get suttesfaction at once. Why do you need satisfaction, you choose not to want it, and you will have it at once, and etc. What's then?
Maybe some of you who played computer games and have tried using cheat codes (some games have so called "Gods mode"), when you can do whatever you want. It is fun, but it is boring, you can spend half an hour of playing and get bored.
So maybe the same applies to the life in general.
One stays in 7d for some time, get bored and the life journey started. Then again reaching 7D, spend some time there and again.
For myself I found that a good start here is getting better understanding on how 2 people become one, lets say a family. Or a group of people who are becoming the one.
How does it happend, at what point, how does this merging taking place.
How does this procces occurs, happening..