““They say the eyes are the first thing to go”—he glances meaningfully at the reading glasses—“but I say it’s curiosity. People hit middle age and they stop questioning. That’s aging. That’s the beginning of the end.” “Questioning? Give me a break. You figured out the world in 1979, at a Grateful Dead show probably, and haven’t questioned anything since. Well, demonstrate all you want, if it makes you feel righteous. But trust me, that’s the only benefit.””