CATECHISM OF THE CATHOLIC CHURCH
SECOND EDITION

Paragraphs 934–937

934 "Among the Christian faithful by divine institution there exist in the Church sacred ministers, who are also called clerics in law, and other Christian faithful who are also called laity." In both groups there are those Christian faithful who, professing the evangelical counsels, are consecrated to God and so serve the Church's saving mission (cf. CIC, can. 207 § 1, 2).
935 To proclaim the faith and to plant his reign, Christ sends his apostles and their successors. He gives them a share in his own mission. From him they receive the power to act in his person.
936 The Lord made St. Peter the visible foundation of his Church. He entrusted the keys of the Church to him. The bishop of the Church of Rome, successor to St. Peter, is "head of the college of bishops, the Vicar of Christ and Pastor of the universal Church on earth" (CIC, can. 331).
937 The Pope enjoys, by divine institution, "supreme, full, immediate, and universal power in the care of souls" (CD 2).