Catechism of the Catholic Church §2737 — excerpt
"You ask and do not receive, because you ask wrongly, to spend it on your passions." If we ask with a divided heart, we are "adulterers"; God cannot answer us, for he desires our well-being, our life.
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: Evagrius Ponticus, De oratione 34: PG 79, 1173 · St. Augustine, Ep. 130, 8, 17: PL 33, 500
