Catechism of the Catholic Church §1175 — excerpt
The Liturgy of the Hours is intended to become the prayer of the whole People of God. In it Christ himself "continues his priestly work through his Church."
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.
Also cites: SC 83 · SC 100 · 86 · 96 · 98 · PO 5