Catechism of the Catholic Church §2249 — excerpt
The conjugal community is established upon the covenant and consent of the spouses. Marriage and family are ordered to the good of the spouses, to the procreation and the education of children.
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.