Catechism of the Catholic Church §2672 — excerpt
The Holy Spirit, whose anointing permeates our whole being, is the interior Master of Christian prayer. He is the artisan of the living tradition of prayer.
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.