Catechism of the Catholic Church §821 — excerpt
Certain things are required in order to respond adequately to this call: - a permanent renewal of the Church in greater fidelity to her vocation; such renewal is the driving-force of the movement toward unity; - conversion of heart as the faithful "try to live…
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: UR 6 · UR 7 # 3 · UR 8 # 1 · UR 9 · UR 10 · UR 4 · 9 · 11 · UR 12