It is necessary to enliven our faith, and to consider that in reciting the divine Office we unite with the angels in praising God. “We begin here upon earth the office of the inhabitants of heaven,” says Tertullian. We then perform on earth the office of the citizens of heaven, who unceasingly praise God, and shall praise him for eternity. Hence, as St. John Chrysostom remarks, before we enter the church or take up the breviary we must leave at the door and dismiss all thoughts of the world.
– St Alphonsus de Liguori (2009-05-30). Dignity and Duties of the Priest, or Selva by St Alphonsus de Liguori (Kindle Locations 6233-6237). St Athanasius Press. Kindle Edition.