Catechism of the Catholic Church §2808 — excerpt
In the decisive moments of his economy God reveals his name, but he does so by accomplishing his work. This work, then, is realized for us and in us only if his name is hallowed by us and in us.
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.