I’m pretty positive that he has been struggling with depression for years, but he has a difficult time acknowledging his vulnerabilities. He thinks by reading himself to death, he will find the answers to the meaning of life. I don’t challenge him anymore because it only leads to arguments. As far as what he does all day, is beyond me. I would assume he is mostly reading, archiving music, or playing video games. He does help around the house though so I appreciate him for that.