Catechism of the Catholic Church §2758 — excerpt
The prayer of the hour of Jesus, rightly called the "priestly prayer" (cf Jn 17), sums up the whole economy of creation and salvation. It fulfills the great petitions of the Our Father.
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.