Catechism of the Catholic Church §550 — excerpt
The coming of God's kingdom means the defeat of Satan's: "If it is by the Spirit of God that I cast out demons, then the kingdom of God has come upon you."
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: LH, Lent, Holy Week, Evening Prayer, Hymn Vexilla Regis: Regnavit a ligno Deus