Catechism of the Catholic Church §2591 — excerpt
God tirelessly calls each person to this mysterious encounter with Himself. Prayer unfolds throughout the whole history of salvation as a reciprocal call between God and man.
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.