It's hard to imagine the mindset it must take to live alone for decades. I read this article and it made me think hard about living a life of significance.
(hopefully one of these links will work for you; if not, try to google the title)
The Last Member of an Uncontacted Tribe
He lived alone in the forest for twenty-six years before dying last month. What did he experience?
https://www.newyorker.com/culture/annals-of-inquiry/the-last-member-of-an-uncontacted-tribe
https://apple.news/AFdW15s8sSBSiA1aLy6lB7Q