In modern times, the sacrificial nature of the Mass is often seriously down-played to the detriment of the faithful. Pope John Paul II lamented this in his encyclical, Ecclesia de Eucharistia that, “at times one encounters an extremely reductive understanding of the Eucharistic mystery. Stripped of its sacrificial meaning, it is celebrated as if it were simply a fraternal banquet.” Speaking about the impact on the ordained priesthood he went on to say, “Furthermore, the necessity of the ministerial priesthood, grounded in apostolic succession, is at times obscured and the sacramental nature of the Eucharist is reduced to its mere effectiveness as a form of proclamation.” A former FBI investigator-turned-priest, Father James B. Collins examines this whole question in depth. Leaning on insights from the New Testament, the Church Fathers, St. Thomas Aquinas, popes Leo XIII, Pius XII, and John Paul II, the Council of Trent, and Vatican II, Father Collins shows how the sacrificial nature of the Mass in the Roman Canon is emphasized and expressed as it always ought to be. This volume offers a foreword by Edward Cardinal Egan.