“I’m a person who listens for a living. I listen for wisdom, and beauty, and for voices not shouting to be heard. This book chronicles some of what I’ve learned in what has become a conversation across time and generations, across disciplines and denominations.” That’s Krista Tippett, host of “On Being” (heard on UPR Sunday evenings at 6:00) talking about her new book “Becoming Wise: An Inquiry into the Mystery and Art of Living” Tippett has interviewed many of the most profound voices examining the great questions of meaning for our time.