Schizophrenic artist August Natterer (1868-1933) may have been a visionary, but it’s hard to tell.

For example, in this drawing, Axel of the World, With Rabbit (1919), he said that the rabbit represents “the uncertainty of good fortune. It began to run on the roller … the rabbit was then changed into a zebra (upper part striped) and then into a donkey (donkey’s head) made of glass. A napkin was hung on the donkey; it was shaved.”

Seneca wrote, “There is no great genius without some touch of madness.”