Business leader-turned-academic Bill George has often told aspiring executives that leadership is more about discovering and building on your true strengths than about becoming a different person. Author of best-selling books including Authentic Leadership and   True North , he was chairman and chief executive officer of medical device maker Medtronic during a decade of high growth. In an interview with Wharton management professor Michael Useem , George, who is now a professor of management practice at Harvard Business School, shares insights about his own path to leadership and offers some advice for aspiring leaders. An edited transcript of the conversation follows. Michael Useem: You ran one of the great medical equipment makers of the world, Medtronic, for a decade. You’ve been on the faculty at the Harvard Business School for a decade. You served on the boards of ExxonMobil, Goldman Sachs [and] the Mayo Clinic.…