We travel because we need to, because distance and difference are the secret tonic of creativity. When we get home, home is still the same. But something in our mind has been changed, and that changes everything. Several new science papers suggest that getting away is an essential habit of effective thinking. When we escape from the place we spend most of our time, the mind is suddenly made aware of all those errant ideas we'd previously suppressed. We start thinking about obscure possibilitiebsthat never would have occurred to us if we'd stayed home.

You know more than you know.

Cities force us to interact with strangers and with the strange. They pry the mind open. And that is why they are the idea that has unleashed so many of our new ideas.

It is ironic but true: the one reality science cannot reduce is the only reality we will ever know. This is why we need art. By expressing our actual experience, the artist reminds us that our science is incomplete, that no map of matter will ever explain the immateriality of our consciousness.

Creativity is a spark. It can be excruciating when we're rubbing two rocks together and getting nothing. And it can be intensely satisfying when the flame catches and a new idea sweeps around the world.

To have a style is to be stuck.

And so we keep on thinking, because the next thought might be the answer.