Faith is the source of light, of guidance for the Christian life. "We walk by faith, not by sight", wrote St Paul. In his first encyclical Pope Francis reflects on the meaning of faith, the beginning of God's gracious salvation. According to Pope Francis, Light of Faith is a "four hand document". Pope Benedict, Francis notes, "handed it to me, it is a strong document. He did the great amount of work". Thus, although officially Light of Faith (Lumen Fidei) is an encyclical of Pope Francis and reflects his teaching ministry, it is also reflects the work of Pope Emeritus Benedict. This is not only Francis' first encyclical; it is also the first encyclical to have been openly written by two successors of St. Peter. Size 8-1/4" x 5-3/4" - pages 111