In this book a leading liturgist gives a step by step commentary on Part Two of the Catechism of the Catholic Church. He links liturgy with catechesis and with conversion, and discusses the ways in which the Church teaches and celebrates God's salvation and gives us a way of gospel living. Worship teaches in ways that intellectual arguments cannot. Since the Catechism connects God's creation and our new creation in Christ as a context for the liturgy, the author emphasizes the importance of celebrating and teaching liturgy within the contemporary culture of society. He sees the liturgical calling down of the Holy Spirit as a source of mission for the local Church and as an impetus towards participation in a specific community. Regis A. Duffy, OFM, (d: 2006) taught at the Washington Theological Union and at the University of Notre Dame. He was later Scholar in Residence at the Franciscan Institute of St. Bonaventure University.