Today the church celebrates Saturday of the Third Week of Advent, and the O Advent proper to the day is O Flower of Jesse’s Stem. Let us pray. O God who threw the childbearing of the Holy Virgin, graciously revealed the radiance of Your glory to the world. Grant we pray that we may venerate with integrity of faith, the mystery of so wondrous an incarnation, and always celebrated with due reverence. Through our Lord Jesus Christ, Your Son who lives and reigns with You in the unity of the Holy Spirit, one God forever and ever. Amen.