This is, to me, the most foundational and profound realization that a person can have. Entire religions and social structures have been invented to avoid thinki

This is, to me, the most foundational and profound realization that a person can have. Entire religions and social structures have been invented to avoid thinking about it. 'You' is indeed a pretty complex concept. It's one of those things that works as long as you don't squint too hard at it, but if you do start to think through some of the cracks in the idea you quickly reach a point where the only reasonable response is existential horror.