Catechism of the Catholic Church §804 — excerpt
One enters into the People of God by faith and Baptism. "All men are called to belong to the new People of God" (LG 13), so that, in Christ, "men may form one family and one People of God" (AG 1).
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.
