If we’re trying to persuade a skeptical audience to believe a new message, the reality is that we’re fighting an uphill battle against a lifetime of personal learning and social relationships. It would seem that there’s nothing much we can do to affect what people believe. But if we’re skeptical about our ability to affect belief, we merely have to look at naturally sticky ideas, because some of them persuade us to believe some pretty incredible things.

This is the most important thing to remember about using statistics effectively. Statistics are rarely meaningful in and of themselves. Statistics will, and should, almost always be used to illustrate a relationship. It’s more important for people to remember the relationship than the number.

When it comes to statistics, our best advice is to use them as input, not output. Use them to make up your mind on an issue. Don’t make up your mind and then go looking for the numbers to support yourself—that’s asking for temptation and trouble.

The researchers theorized that thinking about statistics shifts people into a more analytical frame of mind. When people think analytically, they’re less likely to think emotionally. And the researchers believed it was people’s emotional response to Rokia’s plight that led them to act.

These results are shocking. The mere act of calculation reduced people’s charity. Once we put on our analytical hat, we react to emotional appeals differently. We hinder our ability to feel.