A world is supported by four things….” She held up four big-knuckled fingers. “…the learning of the wise, the justice of the great, the prayers of the righteous and the valor of the brave. But all of these are as nothing….” She closed her fingers into a fist. “…without a ruler who knows the art of ruling. Make that the science of your tradition!”

But reading is active, an act of attention, of absorbed alertness—not all that different from hunting, in fact, or from gathering. In its silence, a book is a challenge: it can’t lull you with surging music or deafen you with screeching laugh tracks or fire gunshots in your living room; you have to listen to it in your head. A book won’t move your