We can engage people’s curiosity over a long period of time by systematically “opening gaps” in their knowledge—and then filling those gaps.

Surprise makes us want to find an answer—to resolve the question of why we were surprised—and big surprises call for big answers. If we want to motivate people to pay attention, we should seize the power of big surprises.

The value of the stories does not come from unexpectedness in and of itself. The value comes from the perfect alignment between Nordstrom’s goals and the content of the stories. These stories could just as easily be destructive in another context.

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.

Sometimes, Tom, we have to do a thing in order to find out the reason for it. Sometimes our actions are questions, not answers.

—John le Carré, ‘A Perfect Spy