Walking shares with making and working that crucial element of engagement of the body and the mind with the world, of knowing the world through the body and the body through the world.

Nearly every book has the same architecture — cover, spine, pages — but you open them onto worlds and gifts far beyond what paper and ink are, and on the inside they are every shape and power. Some books are toolkits you take up to fix things, from the most practical to the mostmysterious, from your house to your heart, or to make things, from cakes to ships. Some books are wings. Some are horses that run away with you. Some are parties to which you are invited, full of friends who are there even when you have no friends. In some books you meet one remarkable person; in others a whole group or even a culture. Some books are medicine, bitter but clarifying. Some books are puzzles, mazes, tangles, jungles. Some long books are journeys, and at the end you are not the same person you were at the beginning. Some are handheld lights you can shine on almost anything.

There's a kind of activism that's more about bolstering identity than achieving results, one that sometimes seems to make the left the true heirs of the Puritans. Puritanical in that the point becomes the demonstration of one's own virtue rather than the realization of results. And puritanical because the somber pleasure of condemning things is the most enduring part of that legacy, along with the sense of personal superiority that comes from pleasure denied. The bleakness of the world is required as contrasting backdrop to the drama of their rising above.