Catechism of the Catholic Church §108 — excerpt
Still, the Christian faith is not a "religion of the book". Christianity is the religion of the "Word" of God, "not a written and mute word, but incarnate and living".
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: St. Bernard, S. missus est hom. 4, 11: PL 183, 86