Catechism of the Catholic Church §1742 — excerpt
Freedom and grace. the grace of Christ is not in the slightest way a rival of our freedom when this freedom accords with the sense of the true and the good that God has put in the human heart.
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: Roman Missal, 32nd Sunday, Opening Prayer: Omnipotens · misericors Deus, universa nobis adversantia propitiatus exclude, ut, mente · corpore pariter expediti, quae tua sunt liberis mentibus exsequamur