Diary of a Madman

Ozzy Osbourne titled one of his albums "Diary of Madman," I think. But isn't every diary that of a madman, really? What else but madness would compel someone to record his innermost thoughts and fears, in the hopes that anyone else would care? Isn't writing fiction in essence an act of madness, the inexplicable and hopeless urge to make sense of life, to force the past into a kind of neat pattern that is aesthestically and artistically pleasing? To believe you can impose such order on chaos is a mild madness surely, but to think anyone would care is sheer insanity.