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's Mass 1. Kyrie Eleison I and II - These two sections open the Mass with a solemn invocation of the Lord, invoking Him for salvation and mercy. The music is derived from the traditional Latin liturgical chants, and it is often sung in a harmony of canon or unison. 2. Invocation - This part of the Mass is a celebrant’s call to the congregation to join in worship. The music is written in a call and response style, with the different lines of text set to different melodies. 3. Gloria - This section of the Mass is focused on praising God. The music is uptempo and expansive, with sweeping horns, snare drums, and choral parts. 4. Credo - This is a declaration of faith, a statement of what Christians believe in, such as the Trinity and the nature of Christ’s sacrificial death. The music is more reflective and introspective than the other sections of the Mass. 5. Sanctus - This section of the Mass is a lyrical song of adoration to God. It features a full orchestra, with a four-part choir. The text is derived from the Latin liturgy, and is often sung with a cappella vocal harmonies.