No matter the ability — whether it’s intelligence, creativity, self-control, charm, or athleticism — studies show them to be profoundly malleable. When it comes to mastering any skill, your experience, effort, and persistence matter a lot. So if you were a bright kid, it’s time to toss out your (mistaken) belief about how ability works, embrace the fact that you can always improve, and reclaim the confidence to tackle any challenge that you lost so long ago.