Catechism of the Catholic Church §2736 — excerpt
Are we convinced that "we do not know how to pray as we ought"? Are we asking God for "what is good for us"? Our Father knows what we need before we ask him, but he awaits our petition because the dignity of his children lies in their freedom.
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.