The artist had a traumatic and violent childhood, and was committed to a mental asylum in his 20s, where he spent the rest of his life. It was during his incarceration that he started drawing, eventually producing over 1500 works and a 25,000 page illustrated 'biography' of Saint Adolf.
Usually people who know you’ll look at them weird for hearing voices don’t tell you they’re hearing voices.
But then how would you know? ;)