The guy in the article has schizophrenia, I think. There is no cure for it. There are ways to cope and ways to improve but there is no scientifically known cure. Stating otherwise could potentially create a dangerous situation for gullible people who’ll stop treatment because apparently it could just go away. It doesn’t work that way, positive thinking helps a lot, of course, but it’s not a cure. It doesn’t mean one can’t have a nice and productive life despite having an illness