Catechism of the Catholic Church §323 — excerpt
Divine providence works also through the actions of creatures. To human beings God grants the ability to co-operate freely with his plans.
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.