Catechism of the Catholic Church §1056 — excerpt
Following the example of Christ, the Church warns the faithful of the "sad and lamentable reality of eternal death" (GCD 69), also called "hell."
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.