'Much' of the mind dies upon physical death

[anagogy]

I used to interpret that section similarly. And like I said, you could be right, and I could be dead wrong.

However, nowadays, I interpret "return to the indigo form-maker body" as simply: consciousness returning to the indigo subdensity of true color yellow which, to my way of understanding, is looking at the energies of indigo ray through the interpretive lense or filter of yellow ray self awareness. So it involves an awareness of indigo ray (which is the native true color ray of sixth density entities) but not precisely the same indigo perspective as the higher self, which is looking at the 3rd density mind from the perspective of actual true color indigo (sixth density). The indigo ray, whether of true color yellow, or any other true color, offers the entity stationed there a high degree of intuitive understanding which is derived from its contact with intelligent energy. This is essentially where a soul has its "life review" at death, after which, upon completion, the entity places its mind at the appropriate vibratory subdensity or subtle plane for its development.