the thing that distinguishes one performer from another is how hard he or she works. That’s it. And what’s more, the people at the very top don’t work just harder or even much harder than everyone else. They work much, much harder.

Anyone who has ever scanned the bookshelves of a new girlfriend or boyfriend- or peeked inside his or her medicine cabinet- understands this implicitly; you can learn as much - or more - from one glance at a private space as you can from hours of exposure to a public face.

Happiness, in one sense, is a function of how closely our world conforms to the infinite variety of human preference.