Catechism of the Catholic Church §1620 — excerpt
Both the sacrament of Matrimony and virginity for the Kingdom of God come from the Lord himself. It is he who gives them meaning and grants them the grace which is indispensable for living them out in conformity with his will.
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.
Also cites: LG 42 · PC 12 · OT 10 · St. John Chrysostom, De virg. 10, 1 PG 48, 540 · John Paul II, FC 16