A proverb meaning there is a very fine line between genius and madness — creative brilliance can border on eccentricity or insanity.
あの発明家の行動を見ると、天才と狂人は紙一重だと感じる。
Watching that inventor's behavior, I feel there's a fine line between genius and madness.
芸術の世界では、しばしば『天才と狂人は紙一重』という言い方をする。
In the art world people often say 'there's but a fine line between genius and madness.'
彼のアイデアは革新的だが常軌を逸している。まさに天才と狂人は紙一重だ。
His idea is innovative but extreme. It's exactly the kind of situation where there's a fine line between genius and madness.