Catechism of the Catholic Church §588 — excerpt
Jesus scandalized the Pharisees by eating with tax collectors and sinners as familiarly as with themselves. Against those among them "who trusted in themselves that they were righteous and despised others", Jesus affirmed: "I have not come to call the righteous, but sinners to repentance."
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.