Muffy: Dust is like atmospheric art, temporary drawings on the sky. Dust is how you know where the air is and where the wind is going, even if, on a physical level, you know already, because it has gone into your eyes. Dust sometimes moves with the traffic, stopping at the stoplights and giving way to pedestrians and people on bicycles and purveyors of apples and pears pushing carts of produce. Dust is something you can never catch because once you have caught it, it's no longer dust. It's grime or dirt or feathers. Dust is the roads getting enthusiastic. It is the meaning of carried away. Dust is always carried away. It is easy to be enthusiastic about dust. Sometimes there are huge pieces of dust which you catch and then they turn out to be cardboard boxes. Tiny pieces hide in nostrils all over the city. We could have a giant dust hunt and everyone would find as much as they wanted.
(from The Blindman's Hat by Bernard Cohen)