If you unmistakably belong to that high-energy breed who derive joy from constant output, you must, at some juncture in life, consciously cultivate and gather younger companions—no matter how wide the age gap. For by their thirties, forties, or fifties, if not sooner, your peers will inevitably lose their vigor, unable to keep pace. When the entire world can no longer join in your revels or share your perceptions, existence becomes profoundly dull.