The Pope's Theologian

 German cardinal Walter Kasper attends a meeting of prayer at St. Peter's Basilica on March 6, 2013 in Vatican City, Vatican.

Walter Kasper, German cardinal of the Roman Catholic Church, president emeritus of the Pontifical Council for Promoting Christian Unity, and author of Mercy: The Essence of the Gospel and the Key to Christian Life (Paulist Press, 2014), talks about his book (that got a good review by Pope Francis) and the shift in emphasis from judgment to mercy in the church today.