Sort of intimidating at first, but then just inspiring. The cofounder of Zipcar. A NASA Space Shuttle pilot and commander. Korea’s first female ambassador. A former COO of Colgate-Palmolive. Two secretaries of state. Several Pulitzer Prize–winning journalists. The cofounder of City Year. The director of Public Citizen’s Global Trade Watch. The executive director of Partners in Health. And so on. There are thousands more, doing less headline-y things; you will meet them, you will rely on them for guidance and sustenance and actual shelter. They're everywhere. Here’s the important part: They were once exactly where you are.