Catechism of the Catholic Church §1558 — excerpt
"Episcopal consecration confers, together with the office of sanctifying, also the offices of teaching and ruling.... In fact ... by the imposition of hands and through the words of the consecration, the grace of the Holy Spirit is given, and a sacred character is impressed…
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: LG 21 · CD 2 # 2