"For now cities sleep. But there are rumblings. Things change. And what if, tomorrow, cities woke, and went walking? If Tokyo engulfed your town? If Vienna came striding over the hill toward you? If the city you inhabit today just upped and left, and you woke tomorrow wrapped in a thin blanket on an empty plain, where Detroit once stood, or Sydney, or Moscow? Don't ever take a city for granted. After all, it is bigger than you are; it is older; and it has learned how to wait …"