Catechism of the Catholic Church §1698 — excerpt
The first and last point of reference of this catechesis will always be Jesus Christ himself, who is "the way, and the truth, and the life."
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. John Eudes, Tract. de admirabili corde Jesu, 1, 5