Earlier quoted context omitted.
I believe it's called a mask. People with some personality disorders gradually develop a sort of behavioral mask to wear in public in order to fit in into the wider society and be able to achieve one's goals. However, having it 'on' is apparently taxing, so it comes off around people who are in one way or another part of some inner circle for whom there's no point to pretend.
> However, having it 'on' is apparently taxing That just sounds like standard introvert, though. The hiker in the article, on the other hand, seems to be off-the-deep-end introvert.
I also assume you can be an introvert who has some spectrum and type of mental illness, sexual and gender classification they choose, past exploitation and/or violence committed against you, etc.
I just think it is interesting b/c the person underneath the shell is different person to person and I think we lump very granular groups into large piles for ease of discussion and use.
I think he wanted a mental health, possibly a moral/spiritual awakening but he was toward the end or had completed the hike and was facing reality that there was a mental issue or past event in his life that he could not get past. Maybe just going back to the "real world" was just to much if it had to be in his own skin with his past.