But to prove that the knowledge gaps exist, it may be necessary to highlight some knowledge first. “Here’s what you know. Now here’s what you’re missing.” Alternatively, you can set context so people care what comes next. It’s no accident that mystery novelists and crossword-puzzle writers give us clues. When we feel that we’re close to the solution of a puzzle, curiosity takes over and propels us to the finish.

The story’s power, then, is twofold: It provides simulation (knowledge about how to act) and inspiration (motivation to act). Note that both benefits, simulation and inspiration, are geared to generating action. In the last few chapters, we’ve seen that a credible idea makes people believe. An emotional idea makes people care. And in this chapter we’ll see that the right stories make people act.

“How do you explain what it feels like to have been recategorized as a human being? That one day you were a normal person living your life, and the next day you were seen as abnormal?

Precisely the place to which our eulogist finally puzzles her way: her own mixed feelings. First she sees that she has them. Then she acknowledges them to herself. Then she considers them as a way into the experience. Then she realizes they are the experience. She begins to write.

Penetrating the familiar is by no means a given. On the contrary, it is hard, hard work.

To put its wisdom simply, one could say the fundamental human challenge is this:

It’s hard to learn if you already know.

Unfortunately, we are hardwired to feel as if we know—as if we see reality itself rather than a version of reality filtered through our biases, backgrounds, or expertise. But we can unlearn the habit of knowing and reinvigorate our curiosity.