The singing of the “Decalogue”—In Lent we sing the traditional “Kyrie Eleison” (Greek for “Lord have mercy”) from the Book of Common Prayer, which as been troped, or augmented, with the Ten Commandments. Note the Priest is wearing “Rose” vestments for the Fourth Sunday in Lent (called in Latin “Laetare Sunday”). The rose color is a symbol for joy. Being halfway through Lent, we take a brief respite from our penance to rejoice in God’s mercy.