Catechism of the Catholic Church §276 — excerpt
Faithful to the witness of Scripture, the Church often addresses her prayer to the "almighty and eternal God" (“omnipotens sempiterne Deus. "), believing firmly that "nothing will be impossible with God" (Gen 18:14; Lk 1:37; Mt 19:26).
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.