Catechism of the Catholic Church §1888 — excerpt
It is necessary, then, to appeal to the spiritual and moral capacities of the human person and to the permanent need for his inner conversion, so as to obtain social changes that will really serve him.
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.
Also cites: LG 36