Catechism of the Catholic Church §1811 — excerpt
It is not easy for man, wounded by sin, to maintain moral balance. Christ's gift of salvation offers us the grace necessary to persevere in the pursuit of the virtues.
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.