Catechism of the Catholic Church §908 — excerpt
By his obedience unto death, Christ communicated to his disciples the gift of royal freedom, so that they might "by the self-abnegation of a holy life, overcome the reign of sin in themselves":
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: LG 36 · St. Ambrose, Psal 118:14:30: PL 15:1476