CCC 175
© Libreria Editrice Vaticana Source: vatican.va
"We guard with care the faith that we have received from the Church, for without ceasing, under the action of God's Spirit, this deposit of great price, as if in an excellent vessel, is constantly being renewed and causes the very vessel that contains it to be renewed." St. Irenaeus, Adv. haeres. 3, 24, I: PG — Patrologia Graeca (Migne)/1, 966.