Catechism of the Catholic Church §780 — excerpt
The Church in this world is the sacrament of salvation, the sign and the instrument of the communion of God and men.
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.