Catechism of the Catholic Church §798 — excerpt
The Holy Spirit is "the principle of every vital and truly saving action in each part of the Body." He works in many ways to build up the whole Body in charity: by God's Word "which is able to build you up"; by Baptism, through…
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: Pius XII, encyclical, Mystici Corporis: DS 3808 · LG 7 # 2 · LG 12 # 2 · AA 3