Catechism of the Catholic Church §1995 — excerpt
The Holy Spirit is the master of the interior life. By giving birth to the "inner man," justification entails the sanctification of his whole being:
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.