Catechism of the Catholic Church §1041 — excerpt
The message of the Last Judgment calls men to conversion while God is still giving them "the acceptable time, . . the day of salvation."
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.