From the Catechism of the Catholic Church…
the source of the Church’s authority comes from Jesus.
**881 **The Lord made Simon alone, whom he named Peter, the “rock” of his Church. He gave him the keys of his Church and instituted him shepherd of the whole flock.400 "The office of binding and loosing which was given to Peter was also assigned to the college of apostles united to its head."401 This pastoral office of Peter and the other apostles belongs to the Church’s very foundation and is continued by the bishops under the primacy of the Pope.
**882 **The Pope, Bishop of Rome and Peter’s successor, "is the perpetual and visible source and foundation of the unity both of the bishops and of the whole company of the faithful."402 "For the Roman Pontiff, by reason of his office as Vicar of Christ, and as pastor of the entire Church has full, supreme, and universal power over the whole Church, a power which he can always exercise unhindered."403
**883 **“The college or body of bishops has no authority unless united with the Roman Pontiff, Peter’s successor, as its head.” As such, this college has "supreme and full authority over the universal Church; but this power cannot be exercised without the agreement of the Roman Pontiff."404
400 Cf. Mt 16:18-19; Jn 21:15-17.401 LG 22 # 2.402 LG 23.403 LG 22; cf. CD 2,9.
404 LG 22; cf. CIC, can 336.
**878 **Finally, it belongs to the sacramental nature of ecclesial ministry that it have a personal character. Although Christ’s ministers act in communion with one another, they also always act in a personal way. Each one is called personally: "You, follow me"397 in order to be a personal witness within the common mission, to bear personal responsibility before him who gives the mission, acting “in his person” and for other persons: “I baptize you in the name of the Father and of the Son and of the Holy Spirit …”; “I absolve you…” 397 Jn 21:22; Cf. Mt 4:19. 21; Jn 1:4.