Catechism of the Catholic Church §1072 — excerpt
"The sacred liturgy does not exhaust the entire activity of the Church": it must be preceded by evangelization, faith, and conversion. It can then produce its fruits in the lives of the faithful: new life in the Spirit, involvement in the mission of the Church, and service to her unity.
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: SC 9