Catechism of the Catholic Church §1709 — excerpt
He who believes in Christ becomes a son of God. This filial adoption transforms him by giving him the ability to follow the example of Christ.
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.