Certainly character was a tremendous asset to Andrew Wiles, who says he has a "single-mindedness that I don't see in most other people." But he also had "a special passion" for Fermat's Last Theorem. It is this sort of fervor and fascination that might just be the cornerstone of grit. The idea that passion fuels perseverance has crucial implications: If grit—and hence high achievement—hinges on passion, then it's especially important for parents to expose their children to the broadest possible range of academic, artistic and athletic activities, to maximize the chances that something will capture the child's imagination. Helping children find their passion may turn out to be more important than addressing their academic weaknesses.