Tao Te Ching

“but after all and above all it depends on who is diseased, who mad, who epileptic or paralytic: an average dull-witted man, in whose illness any intellectual or cultural aspect is non-existent; or a Nietzsche or Dostoyevsky. In their case something comes out in illness what is more important and conductive to life and growth than any medical guaranteed health or sanity... in other words: certain conquests made by the soul and the mind are impossible without disease, madness, crime of the spirit.”

— Thomas Mann 1875 – 1955 CE
Deep, psychologically insightful author
from An Appeal to Reason (1930)