“In order to understand a sentence like “Don’t do drugs,” for example, a child has to think of what it means to do drugs. Just like you had to think of the word “rhinoceros” in order to understand my sentence, the child also has to picture himself or herself doing drugs so they know exactly what to avoid. Unfortunately, as we’ll learn from the “if” chapter, when people imagine themselves taking an action, they become much more likely to take that action in real life, too.”