People here talk of the Mauer im Kopf or the Wall in the Head. I thought this was just a shorthand way of referring to how Germans define themselves still as easterners and westerners. But I see now a more literal meaning: the Wall and what it stood for do still exist. The Wall persists in Stasi men’s minds as something they hope might one day come again, and in their victims’ minds too, as a terrifying possibility.