what is the "density" exactly means?

[unity100]

Why do 4D entities need to "shield" their whole density from 3rd density? Because it is simply not useful energy?

i think they are incompatible.

What is the mechanism for the incompatibility between 3d and 4d? The logos created each density to have discrete properties.

indeed so !

that's the catch. i think, the discreteness is not so very well there, in early 3 densities.

for, 1, 2, and 3d is able to coexist, and they overlap and physically contact each other.

but, starting from 4th, things change. paranormal starts. it is possible to be invisible to 3, as 4d. i very much suspect from what i understand, it becomes basically a totally different 'dimension'. same goes for 5th and so on. im not sure even the materials of these densities can contact the lower 3, in physicality. in 4th, thoughts also start to directly become things, in a noticeable manner, than just being attractors of catalyst to the self like in 3d or lower.

i also suspect that whatever underlies this, is also the thing underlying the reason behind why Ra names green ray as the springboard ray. the base ray etc.

therefore, this reason, i dont know. there is great disparage in between manifestations of first 3 densities and the 4th. discovering the reason for this incompatibility, disparage, could lead to a lot of insight.

If the experiential distortions of each dimension are discrete, then what is going on with the shielding or the incompatibility? Why are 1st and 2nd compatible, (and 1st, 2nd and 4th, combined, compatible)?

this is a good question.

EDIT: I think I got it now - they are simply incompatible for a only a certain period of time where they must necessarily be blended and transparent to each other.

however after that point, 4d will still be able to be invisible to 3rd, however 3, 2, 1th densities will be in the same situation in regard to each other. in a sense, 4d is basically almost totally isolated from 3d, whereas all the other lower densities are isolated from each other only superficially. (in physical sense).