Catechism of the Catholic Church §52 — excerpt
God, who "dwells in unapproachable light", wants to communicate his own divine life to the men he freely created, in order to adopt them as his sons in his only-begotten Son.
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.