Catechism of the Catholic Church §2782 — excerpt
We can adore the Father because he has caused us to be reborn to his life by adopting us as his children in his only Son: by Baptism, he incorporates us into the Body of his Christ; through the anointing of his Spirit who flows…
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: St. Cyril of Jerusalem, Catech. myst. 3, 1: PG 33, 1088A · St. Cyprian, De Dom. orat. 9: PL 4, 525A