Movies are made out of darkness as well as light; it is the surpassingly brief intervals of darkness between each luminous still image that make it possible to assemble the many images into one moving picture. Without that darkness, there would only be a blur. Which is to say that a full-length movie consists of half an hour or an hour of pure darkness that goes unseen. If you could add up all the darkness, you would find the audience in the theater gazing together at a deep imaginative night. It is the terra incognita of film, the dark continent on every map. In a similar way, a runner’s every step is a leap, so that for a moment he or she is entirely off the ground. For those brief instants, shadows no longer spill out from their feet, like leaks, but hover below them like doubles, as they do with birds, whose shadows crawl below them, caressing the surface of the earth, growing and shrinking as their makers move nearer or farther from that surface. For my friends who run long distances, these tiny fragments of levitation add up to something considerable; by their own power they hover above the earth for many minutes, perhaps some significant portion of an hour or perhaps far more for the hundred-mile races. We fly; we dream in darkness; we devour heaven in bites too small to be measured.

A happy love is a single story, a disintegrating one is two or more competing, conflicting versions, and a disintegrated one lies at your feet like a shattered mirror, each shard reflecting a different story, that it was wonderful, that it was terrible, if only this had, if only that hadn't. The stories don't fit back together, and it's the end of stories, those devices we carry like shells and shields and blinkers and occasionally maps and compasses. The people close to you become mirrors and journals in which you record your history, the instruments that help you know yourself and remember yourself, and you do the same for them. When they vanish so does the use, the appreciation, the understanding of those small anecdotes, catchphrases, jokes: they become a book slammed shut or burnt.

The term 'politics of prefiguration' has long been used to describe the idea that if you embody what you aspire to, you have already succeeded. That is to say, if your activism is already democratic, peaceful, creative, then in one small corner of the world these things have triumphed. Activism, in this model, is not only a toolbox to change things but a home in which to take up residence and live according to your beliefs, even if it's a temporary and local place...