Catechism of the Catholic Church §2231 — excerpt
Some forgo marriage in order to care for their parents or brothers and sisters, to give themselves more completely to a profession, or to serve other honorable ends.
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.