Catechism of the Catholic Church §1026 — excerpt
By his death and Resurrection, Jesus Christ has "opened" heaven to us. the life of the blessed consists in the full and perfect possession of the fruits of the redemption accomplished by Christ.
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.