If we carefully inspect our experience as we read, we discover that the importance of physical detail is that it creates for us a kind of dream, a rich and vivid play in the mind. We read a few words at the beginning of the book or the particular story, and suddenly we find ourselves seeing not words on a page but a train moving through Russia, an old Italian crying, or a farmhouse battered by rain. We read on—dream on—not passively but actively, worrying about the choices the characters have to make, listening in panic for some sound behind the fictional door, exulting in characters’ successes, bemoaning their failures. In great fiction, the dream engages us heart and soul; we not only respond to imaginary things—sights, sounds, smells—as though they were real, we respond to fictional problems as though they were real: We sympathize, think, and judge. We act out, vicariously, the trials of the characters and learn from the failures and successes of particular modes of action, particular attitudes, opinions, assertions, and beliefs exactly as we learn from life. Thus the value of great fiction, we begin to suspect, is not just that it entertains us or distracts us from our troubles, not just that it broadens our knowledge of people and places, but also that it helps us to know what we believe, reinforces those qualities that are noblest in us, leads us to feel uneasy about our faults and limitations.