3D Earth will no longer be inhabitable?

[Minyatur]

The entity will eventually merge/combine with whatever complementing part it is separated from to create a more complete whole.

I often repeat that separation is unity but I find it hard to convey why that is so.

Here I think you stated it nicely that separation is a mean for synergy, by separating a whole into parts this whole becomes greater than the sum of its parts and this is what separation has to offer. To make the whole greater in love and light.

Without separation there is no cosmos, there is no star, there is no self/other-selves, there is no awareness, there is no love and there is no light. These are all things gained through separation, there is no one thing your mind can think if that is not held and born in the unity of separation.