The book of Revelation of St. John, read in the Church's Liturgy, first Reveals to us, "A throne stood in heaven, with one seated on the throne": "the Lord God." 1 It then shows the Lamb, "standing, as though it had been slain": Christ crucified and risen, the one high Priest of the true sanctuary, the same one "who offers and is Offered, who gives and is given." 2 Finally it presents "the river of the Water of life . . . flowing from the throne of God and of the Lamb," one of most beautiful symbols of the Holy Spirit. 3