Harvard behavioral social scientist and author of "The Happiness Files" Arthur C. Brooks argues that self-doubt is usually evidence of healthy humility—not incompetence—and a clear contrast to the overconfidence of “dark-triad” personalities. Brooks shows executives how to reframe imposter feelings as diagnostic feedback, then “lean in without giving in” by targeting the specific skills and knowledge gaps those feelings reveal, turning discomfort into a disciplined catalyst for growth.