To know someone truly, look at what he does when no one is paying him. My wife makes jewelry, my father gardens, I write, my grandfather cleared brush from the woods by his house. Seeking the common core of varied hobbies, I notice in all a devotion of effort toward a self-imposed goal. To accomplish something is every hobby's purpose, but what is the purpose of the accomplishment? We are less interested in the accomplishment than the accomplishing. Hobbies express an entrenched urge to create, to add patches of order to the universe. In our hobbies as in our careers, we stack the world's raw scraps into meaningful shapes—arranging dirt into flower beds, stones into necklaces, words into paragraphs. We curse a Saturday that sees no progress on our projects, not because anyone needs what we produce, but because we need to produce. At work we long for leisure; in leisure we keep working.