“There's a fine line between genius and insanity--and I enjoy trampling all over it.”

“There's a fine line between genius and insanity. I have erased this line.”

“There's a fine mascara line between genius and insanity”

“There is a fine line between insanity and genius.”

“And there's a thin line between genius and insanity, isn't there?”

“There's a fine line between criminality and genius."-Dan Cahill”

“A lot of people say there's a fine line between genius and insanity. I don't think there's a fine line, I actually think there's a yawning gulf. You see some poor bugger scuffling up the road with balloons tied to his ears, he's not going home to invent a rocket, is he?”