“Insanity, madness, obsession, math, objectivity, truth, science and art. These friends always impress me. They’re sculptors and tailors, not scientists or spies. I’ve chosen them with the peculiar attentiveness of a shell collector stupidly combining the overwhelming multitude of broken detritus to hold up one shell so beautiful that it finds its way into my pocket, lining my clothes with sand. And then another. Not too many, so that the sheer number could never diminish the value of one.” On madness and genius with cosmologist Janna Levin.