FWIW, this is a decent description of what I'm talking about: https://en.wikipedia.org/wiki/Ramana_Maharshi#Self
> Ramana considered the Self to be permanent and enduring, surviving physical death. "The sleep, dream and waking states are mere phenomena appearing on the Self," as is the "I"-thought. Our "true nature" is "simple Being, free from thoughts".
As I understand it from Burroughs, there are seven souls in the Egyptian theory. Three of them are eternal. Sort of like components of Ramana's Self: Ren (meaning, destiny), Sekem (energy, power) and Khu (guardian). Then there's Ba (emotion), Ka (the double) and Khaibit (memory). And Sekhu (remains). The only one left after ones death is Ka, which has the chance at eternity in the Western Lands.
I only know that stuff from Burroughs' The Western Lands, which is his take on a "book of the dead".