Music was literally in the air at the time, the Vienna of 1780. Everybody played music, classical music. There were in fact so many musicians that in apartment buildings people had to come up with a schedule - you practice at 5 p.m., I'll practice at 6 p.m. That way the music didn't collide with one another.

A mystery is not a puzzle waiting to be solved, but rather something for which there is no human solution. Mystery's offspring is not frustration but awe, and that sense of awe grows in tandem with knowledge.

The word "utopia" has two meanings. It means both "good place" and "nowhere". That's the way it should be. The happiest places, I think, are the ones that reside just this side of paradise. The perfect person would be insufferable to live with; likewise, we wouldn't want to live in the perfect place, either. "A life time of happiness! No man could bear it: It would be hell on earth," wrote George Bernard Shaw, in his play Man and Superman.

You look around the world at geniuses, and they don't appear randomly, they appear in genius clusters. Athens in 50 BC, Florence 1500, Silicon Valley today. This is not a coincidence.

Perhaps it's true you can't go back in time, but you can return to the scene of a love, of a crime, of happiness, and of a fateful decision; the places are what remain, are what you can possess, are what is immortal.

Money matters but less than we think and not in the way that we think. Family is important. So are friends. Envy is toxic. So is excessive thinking. Beaches are optional. Trust is not. Neither is gratitude.

For me, a place unvisited is like an unrequited love. A dull ache that- try as you might to think it away, to convince yourself that she really wasn't the right country for you- just won't leave you in peace.