that thin line between them. In fact, it’s not a thin line but bolos

This is pretty interesting. I was not aware of it, but when I compare it to similar ideas like tzimtzum (contraction of infinite), or Maya (veiling and projection), I definitely see a clear parallel.

I, personally, would say that the split itself is the “illusion and veil”.

(source)

There is “line” and “background”. “Line” is “white” and “background” is “green”. But in reality it’s all “color”. But even this description is still in the realm of concepts.

Anyway, good luck :)