Mental

 It is my experience that a serious mental illness is never cured. It is held at bay by willpower, therapy, support and medication. Mental illness is a shadow that is always with you, and the shadow and its person often flip in the reality of the ill person.

The brain of the ill person conjures an alternative reality that clashes with the reality most of us share, a reality that can be dangerous to themselves and others.
There has been much written about creativity and madness. They share the emergence of new and unsettling realities. Sometimes, though, these two human capacities come together in a fruitful way for society, if not for the individual.