+Jn 21: 15-19
When they had finished breakfast, Jesus said to Simon Peter, “Simon, son of John, do you love me more than these?” He said to him, “Yes, Lord, you know that I love you.” He said to him, “Feed my lambs.”
He then said to him a second time, “Simon, son of John, do you love me?” He said to him, “Yes, Lord, you know that I love you.” He said to him, “Tend my sheep.”
He said to him the third time, “Simon, son of John, do you love me?” Peter was distressed that he had said to him a third time, “Do you love me?” and he said to him, “Lord, you know everything; you know that I love you.” (Jesus) said to him, “Feed my sheep.
Amen, amen, I say to you, when you were younger, you used to dress yourself and go where you wanted; but when you grow old, you will stretch out your hands, and someone else will dress you and lead you where you do not want to go.”
He said this signifying by what kind of death he would glorify God. And when he had said this, he said to him, “Follow me.”
The New American Bible
The Catechism of the Catholic Church
“The keys of the kingdom”
551 From the beginning of his public life Jesus chose certain men, twelve in number, to be with him and to participate in his mission. He gives the Twelve a share in his authority and ‘sent them out to preach the kingdom of God and to heal.” They remain associated for ever with Christ’s kingdom, for through them he directs the Church:
As my Father appointed a kingdom for me, so do I appoint for you that you may eat and drink at my table in my kingdom, and sit on thrones judging the twelve tribes of Israel.
552 Simon Peter holds the first place in the college of the Twelve; Jesus entrusted a unique mission to him. Through a revelation from the Father, Peter had confessed: “You are the Christ, the Son of the living God.” Our Lord then declared to him: “You are Peter, and on this rock I will build my Church, and the gates of Hades will not prevail against it.” Christ, the “living Stone”, thus assures his Church, built on Peter, of victory over the powers of death. Because of the faith he confessed Peter will remain the unshakable rock of the Church. His mission will be to keep this faith from every lapse and to strengthen his brothers in it.
553 Jesus entrusted a specific authority to Peter: “I will give you the keys of the kingdom of heaven, and whatever you bind on earth shall be bound in heaven, and whatever you loose on earth shall be loosed in heaven.” The “power of the keys” designates authority to govern the house of God, which is the Church. Jesus, the Good Shepherd, confirmed this mandate after his Resurrection: “Feed my sheep.” The power to “bind and loose” connotes the authority to absolve sins, to pronounce doctrinal judgements, and to make disciplinary decisions in the Church. Jesus entrusted this authority to the Church through the ministry of the apostles and in particular through the ministry of Peter, the only one to whom he specifically entrusted the keys of the kingdom.
Saints Marcellinus and Peter
Saints Marcellinus and Peter (sometimes called Petrus Exorcista; Italian: Marcellino e Pietro) were two 4th century Christian martyrs in the city of Rome.
Very little is known about the two martyrs’ lives. Marcellinus, a priest, and Peter, an exorcist, died in the year 304, during the Diocletianic Persecution. Pope Damasus I claimed that he heard the story of these two martyrs from their executioner who became a Christian after their deaths. Damasus’ account is the oldest source concerning these two martyrs. Damasus states that they were killed at an out-of-the-way spot by the magistrate Severus or Serenus, so that other Christians would not have a chance to bury and venerate their bodies. The two saints happily cleared the spot chosen for their death: a thicket overgrown with thorns, brambles, and briers three miles from Rome. They were beheaded and buried in that spot.
Two women, Lucilla and Firmina, assisted by divine revelation, found the bodies, however, and had them properly buried. They buried their bodies near the body of St. Tiburtius on the Via Labicana in what became known as the Catacombs of Marcellinus and Peter. Alban Butler writes that “it was thought at one time that forty-four other martyrs died with Marcellinus and Peter, but this is due to a misreading of the Hieronymianum.”
Around the 6th century, a passio connected the martyrdom of Marcellinus and Peter with that of the jailer Art(h)emius, who was converted to Christianity by Marcellinus. Artemius’ wife Secunda (or Candida) and daughter Paulina were also converted. Artemius was beheaded; Secunda and Paulina were buried alive under a pile of stones. The passio states that they were killed at the 12th milestone on the Via Aurelia in a place called Silva Candida (“Whitewood”, also called Silva Nigra, “Blackwood”, or at Lorium). Their executioner, Dorotheus, was said to have been converted by Pope Julius I.