Milan, 384

Augustine is thirty and full of questions and cannot get an hour alone with the man who might answer them. Ambrose, Bishop of Milan, keeps a door that is never shut. Anyone may walk in. Augustine walks in repeatedly, and repeatedly finds him reading, and repeatedly stands there and says nothing, and after a long time leaves.

What stops him is the manner of it. “When he read, his eyes travelled across the page and his heart searched out the sense, but his voice and tongue were silent.”

Augustine is so struck that he devotes a paragraph to hypotheses. Perhaps the bishop is sparing his voice, which is delicate. Perhaps he wishes to avoid being asked to explain a difficult passage by an eager listener, which would cost him the whole afternoon. Perhaps it is simply rest.

He does not arrive at the possibility that a man might be somewhere the room cannot follow, because in 384 that is not yet a place.

Scholars have argued for a century about how unusual silent reading actually was. The argument is beside the point. What is not in dispute is that a literate and unusually observant man watched another man read, and could not account for it, and had to guess.

Somewhere between that doorway and this sentence, a private interior was constructed, furnished, declared to be the seat of the self, and made the basis of an entire moral system. It was not discovered. It was a side effect of a change in how the eyes move.