Catechism of the Catholic Church §669 — excerpt
As Lord, Christ is also head of the Church, which is his Body. Taken up to heaven and glorified after he had thus fully accomplished his mission, Christ dwells on earth in his Church.
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 3 · 5