Catechism of the Catholic Church §1052 — excerpt
"We believe that the souls of all who die in Christ's grace . . are the People of God beyond death. On the day of resurrection, death will be definitively conquered, when these souls will be reunited with their bodies" (Paul VI, CPG # 28).
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.