Catechism of the Catholic Church §1152 — excerpt
Sacramental signs. Since Pentecost, it is through the sacramental signs of his Church that the Holy Spirit carries on the work of sanctification. the sacraments of the Church do not abolish but purify and integrate all the richness of the signs and symbols of the cosmos and of social life.
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.