Only on the "CBS This Morning" podcast, New York Times op-ed columnist David Brooks joins co-host Gayle King to discuss his new book, "The Second Mountain: The Quest for a Moral Life." Brooks explains how in life, we face two mountains -- the first is our climb toward personal success and the second is when we learn to live for our relationships to lead more fulfilled lives. He shares the personal struggles and isolation that prompted him to face life's second mountain. Plus, hear why Brooks says we shouldn?t simply tell recent grads to "follow their dreams."