馬鹿と天才は紙一重;バカと天才は紙一重 [ばかとてんさいはかみひとえ(馬鹿と天才は紙一重);バカとてんさいはかみひとえ] /(exp) (proverb) there's but a fine line between genius and insanity/EntL2833979/