To give context to the advancement of life...

[Adonai One]

We should remember the densities are not seperate planes and realities. Ra makes this clear in many passages. They are simply levels of life. The different space/time continuas are seperate and deliberately manifested phenomenon.

In truth there is only one physical reality that is divided out into different planes for various reasons along with the inner planes (afterlife) that manifest from the activity of the physical.

Ra has stated that all densities of life would inherently see each other if it weren't for the higher entites hiding from third-density life.

Again, there is one physical reality. It remains mostly physical into the late 5th-density where it all blends and the bodies start turning into light.

13.20 Questioner: Is there any physical difference between first and second density? For instance, if I could see a second-density planet and a first-density planet side by side, in my present condition, could I see both of them? Would they be both visible?

Ra: I am Ra. This is correct. All of the octave of your densities would be clearly visible were not the fourth through the seventh freely choosing not to be visible.

Higher-density entities are not disincarnate spirits. 4th-density is not an Abrahamic heaven.