Catechism of the Catholic Church §2852 — excerpt
"A murderer from the beginning, . . a liar and the father of lies," Satan is "the deceiver of the whole world." Through him sin and death entered the world and by his definitive defeat all creation will be "freed from the corruption of sin and death."
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: Roman Missal, Eucharistic Prayer IV, 125 · St. Ambrose, De Sacr. 5, 4, 30: PL 16, 454