Lamb of God modern Roman Catholic Christology, Karl Rahner has continued to elaborate on the analogy that the blood of the Lamb of God, and the water flowing from the side of Christ on Calvary, had a cleansing nature, similar to baptismal water. In this analogy, the blood of the Lamb washed away the sins of humanity in a new baptism, redeeming it from the fall of Adam. In the Mass of the Roman Rite and also in the Eucharist of the Anglican Communion, the Lutheran Church, and the Western Rite of the Orthodox Church the "Agnus Dei" is the invocation to the
Requiem for a Tribe Brother reprise of the "Hosannas" from the previous movement. In common with the second movement, the "Agnus Dei" is a slow chorale, featuring a highly pungent harmonic language and many unusual shifts of key. This movement features two soprano soli which float above the rest of the choir throughout. A fast and fiery dance primarily for tenors, built on an ostinato figure in the basses. Towards the end of the movement, there is a brief reprise of material from the opening "Requiem aeternam". The serene concluding movement, in C major, derives its melody from the opening of the "Song of Hope"