Concerning the Spiritual in art
In geography,it is often told that the higher one goes,the cooler the environment.
Leaving geographical matters alone,one can learn from art history this simple fact.
Whereby the creative ability/genius leads one to insanity.
Mental disorders such as autism,melancholy,ADD…etc,dramatize and characterize creative people in art history.
Why they “snap off” I don’t know.Maybe it’s because transcendence as an act of being superior in excellence,”drains off” it’s potential candidates.
May be that’s why you have smart and highly creative people suffering in mental asylums because of excelling in their respective realms.