Every Preface concludes with similar words that connect our celebration of Mass with the heavenly liturgy where, with the saints and angels, “we sing the hymn of your glory, as without end we acclaim…” This leads us into the ancient hymn of praise called the “Sanctus” or “Holy, Holy”. The text refers back to two passages in the Scriptures. First, in the Book of the Prophet Isaiah, Isaiah has a vision of God’s throne surrounded by the seraphim (a class of angels). “One cried out to the other: ‘Holy, holy, holy is the LORD of hosts! All the earth is filled with his glory!’” (Is. 6:3). The second part of the Sanctus, comes from the Lord’s triumphal entry into Jerusalem as recorded in the Gospels. As Jesus enters the city, the crowds line the path with cloaks and palm branches and cry out: “Hosanna to the Son of David; blessed is he who comes in the name of the Lord; hosanna in the highest.” (Mt. 21:9) The Sanctus, which is found in some of the earliest Eucharistic Prayers, is intended for the whole assembly to participate in, preferably by singing the acclamation. As it is the people’s part of the Eucharistic Prayer, it should never be relegated only to the choir, but rather presented in a musical setting easily sung by the people so that all may join in. At the conclusion of the Sanctus, the assembly kneels, and the priest begins the core part of the Eucharistic Prayer, which is properly known as the “Anaphora.”