Nearly a quarter century ago, at a gathering in Phoenix, Arizona, John W. Gardner delivered a speech that may be one of the most quietly influential speeches in the history of American business — a text that has been photocopied, passed along, underlined, and linked to by senior executives in some of the most important companies and organizations in the world. I wonder, though, how many of these leaders (and the business world more broadly) have truly embraced the lessons he shared that day.