Catechism of the Catholic Church §381 — excerpt
Man is predestined to reproduce the image of God's Son made man, the "image of the invisible God" (Col 1:15), so that Christ shall be the first-born of a multitude of brothers and sisters (cf Eph 1:3-6; Rom 8:29).
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.