Catechism of the Catholic Church §1866 — excerpt
Vices can be classified according to the virtues they oppose, or also be linked to the capital sins which Christian experience has distinguished, following St.
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. Gregory the Great, Moralia in Job, 31, 45: PL 76, 621A