Catechism of the Catholic Church §1592 — excerpt
The ministerial priesthood differs in essence from the common priesthood of the faithful because it confers a sacred power for the service of the faithful.
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.