Catechism of the Catholic Church §248 — excerpt
At the outset the Eastern tradition expresses the Father's character as first origin of the Spirit. By confessing the Spirit as he "who proceeds from the Father", it affirms that he comes from the Father through the Son.
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: AG 2 · Council of Florence (1439): DS 1302 · Council of Florence (1442): DS 1331 · Council of Lyons II(1274): DS 850
