Today is the first Sunday of Advent, which is also the first Sunday of a new liturgical year for the Church, year A. The Advent season includes the four Sundays that precede Christmas. It is a time of preparation for the coming of the Lord. In this season, we recall two central elements of our faith: the final coming of the Lord in glory and the incarnation of the Lord in the birth of Jesus. Key themes of the Advent season are watchful waiting, preparation, and justice.