Needs sauce badly.
Sounds very similar to a theory I heard that stuck with me for some reason. Don't remember where from. Kind of had a Gnostic feel to it. And I'm gonna butcher it…
Basically that we are two creatures right now.The real us and our Inter Monologue, or ego, the thing we think is us in our heads… basically that voice is a separate entity, 5th dimensional parasite, or whatever they call it in Gnosticism.
I remember reading that craziness around the same time Q originally posted what you are quoting and I think thats why it stuck with me.
Having the thing you thought was you your entire life turn out to be something else