New York Times columnist David Brooks explores a life well lived. In this episode he examines happiness and commitments. In his book "The Road to Character," he studies people who radiate an inner light. What work did they do to reach higher levels of happiness? A successful life usually depends on making four major commitments: to spouse or family, a faith or philosophy, a community, and a vocation. How do we choose what we will commit to, and how do we execute those commitments?