"the line between genius and insanity is a fine one" in German The line between genius and insanity is a fine one. Der Grat zwischen Genie und Wahnsinn ist schmal. Detailed translations for "the line between genius and insanity is a fine one" The line between genius and insanity is a fine one. The line between genius and insanity is a fine one. Der Grat zwischen Genie und Wahnsinn ist schmal.