So for every Picasso, there's a Cezanne, who if you go to Le Musee d'Orsay and you look at all of his greatest works, they're all painted in his 50s and 60s, or for every Melville who writes Moby Dick at 28 or 29, there is a Mark Twain who writes 'Huckleberry Finn' in his late 40s or early 50s.