Catechism of the Catholic Church §2703 — excerpt
This need also corresponds to a divine requirement. God seeks worshippers in Spirit and in Truth, and consequently living prayer that rises from the depths of the soul.
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.