Catena Aurea by St. Thomas Aguinas
John CHAP. 21
21:15–17
15. So when they had dined, Jesus saith to Simon Peter, Simon, son of Jonas, lovest thou me more than these? He saith unto him, Yea, Lord; thou knowest that I love thee. He saith unto him, Feed my lambs.
16. He saith to him again the second time, Simon, son of Jonas, lovest thou me? He saith unto him, Yea, Lord; thou knowest that I love thee. He saith unto him, Feed my sheep.
17. He saith unto him the third time, Simon, son of Jonas, lovest thou me? Peter was grieved because he said unto him the third time, Lovest thou me? And he said unto him, Lord, thou knowest all things; thou knowest that I love thee. Jesus saith unto him, Feed my sheep.
THEOPHYLACT. The dinner being ended, He commits to Peter the superintendence over the sheep of the world, not to the others: So when they had dined, Jesus saith to Simon Peter, Simon, son of Jonas, lovest thou Me more than these?
AUGUSTINE. Our Lord asked this, knowing it: He knew that Peter not only loved Him, but loved Him more than all the rest.
ALCUIN. He is called Simon, son of John, John being his natural father. But mystically, Simon is obedience, John grace, a name well befitting him who was so obedient to God’s grace, that he loved our Lord more ardently than any of the others. Such virtue arising from divine gift, not mere human will.
AUGUSTINE. While our Lord was being condemned to death, he feared, and denied Him. But by His resurrection Christ implanted love in his heart, and drove away fear. Peter denied, because he feared to die: but when our Lord was risen from the dead, and by His death destroyed death, what should he fear? He saith unto Him, Yea, Lord; Thou knowest that I love Thee. On this confession of his love, our Lord commends His sheep to him: He saith unto him, Feed My lambs: as if there were no way of Peter’s shewing his love for Him, but by being a faithful shepherd, under the chief Shepherd.
CHRYSOSTOM. (Hom. lxxxviii. 1) That which most of all attracts the Divine love is care and love for our neighbour. Our Lord passing by the rest, addresses this command to Peter: he being the chief of the Apostles, the mouth of the disciples, and head of the college. Our Lord remembers no more his sin in denying Him, or brings that as a charge against him, but commits to him at once the superintendence over his brethren. If thou lovest Me, have rule over thy brethren, shew forth that love which thou hast evidenced throughout, and that life which thou saidst thou wouldest lay down for Me, lay down for the sheep.
He saith to him again the second time, Simon, son of Jonas, lovest thou Me? He saith unto Him, Yea, Lord; Thou knowest that I love Thee.
AUGUSTINE. (Tract. cxxii) Well doth He say to Peter, Lovest thou Me (ἀγαπᾶς diligis), and Peter answer, Amo Te (φελῶ amo), and our Lord replies again, Feed My lambs. Whereby, it appears that amor and dilectio are the same thing: especially as our Lord the third time He speaks does not say, Diligis Me, but Amas Me. He saith unto him the third time, Simon, son of Jonas, lovest thou Me? A third time our Lord asks Peter whether he loves Him. Three confessions are made to answer to the three denials; that the tongue might shew as much love as it had fear, and life gained draw out the voice as much as death threatened.
CHRYSOSTOM. (Hom. lxxxviii) A third time He asks the same question, and gives the same command; to shew of what importance He esteems the superintendence of His own sheep, and how He regards it as the greatest proof of love to Him.
THEOPHYLACT. Thence is taken the custom of threefold confession in baptism.
CHRYSOSTOM. (Hom. lxxxviii) The question asked for the third time disturbed him: Peter was grieved because He said unto him the third time, Lovest thou Me? He was afraid perhaps of receiving a reproof again for professing to love more than he did. So he appeals to Christ Himself: And he said unto Him, Lord, Thou knowest all things, i. e. the secrets of the heart, present and to come.
AUGUSTINE. (de Verb. Dom. serm. 50) He was grieved because he was asked so often by Him Who knew what He asked, and gave the answer. He replies therefore from his inmost heart; Thou knowest that I love Thee.
AUGUSTINE. (Tract. cxxiv) He says no more, He only replies what he knew himself; he knew he loved Him; whether any else loved Him he could not tell, as he could not see into another’s heart: (non occ.). Jesus saith unto him, Feed My sheep; as if to say, Be it the office of love to feed the Lord’s flock, as it was the resolution of fear to deny the Shepherd.
THEOPHYLACT. There is a difference perhaps between lambs and sheep. The lambs are those just initiated, the sheep are the perfected.
ALCUIN. To feed the sheep is to support the believers in Christ from falling from the faith, to provide earthly sustenance for those under us, to preach and exemplify withal our preaching by our lives, to resist adversaries, to correct wanderers.
AUGUSTINE. (Tract. cxxiii) They who feed Christ’s sheep, as if they were their own, not Christ’s, shew plainly that they love themselves, not Christ; that they are moved by lust of glory, power, gain, not by the love of obeying, ministering, pleasing God. Let us love therefore, not ourselves, but Him, and in feeding His sheep, seek not our own, but the things which are His. For whoso loveth himself, not God, loveth not himself: man that cannot live of himself, must die by loving himself; and he cannot love himself, who loves himself to his own destruction. Whereas when He by Whom we live is loved, we love ourselves the more, because we do not love ourselves; because we do not love ourselves in order that we may love Him by Whom we live.
AUGUSTINE. (Serm. Pass.) But unfaithful servants arose, who divided Christ’s flock, and handed down the division to their successors: and you hear them say, Those sheep are mine, what seekest thou with my sheep, I will not let thee come to my sheep. If we call our sheep ours, as they call them theirs, Christ hath lost His sheep.
21:18–19
18. Verily, verily, I say unto thee, When thou wast young, thou girdedst thyself, and walkedst whither thou wouldest: but when thou shalt be old, thou shalt stretch forth thy hands, and another shall gird thee, and carry thee whither thou wouldest not.
19. This spake he, signifying by what death he should glorify God.
CHRYSOSTOM. (Hom. lxxxvii) Our Lord having made Peter declare his love, informs him of his future martyrdom; an intimation to us how we should love: Verily, verily, I say unto thee, When thou wast young, thou girdedst thyself, and walkedst whither thou wouldest. He reminds him of his former life, because, whereas in worldly matters a young man has powers, an old man none; in spiritual things, on the contrary, virtue is brighter, manliness stronger, in old age; age is no hindrance to grace. Peter had all along desired to share Christ’s dangers; so Christ tells him, Be of good cheer; I will fulfil thy desire in such a way, that what thou hast not suffered when young, thou shalt suffer when old: But when thou art old. Whence it appears, that he was then neither a young nor an old man, but in the prime of life.
ORIGEN. (super. Matt.) It is not easy to find any ready to pass at once from this life; and so he says to Peter, When thou art old, thou shalt stretch forth thy hand.
AUGUSTINE. (Tract. cxxiii. 5) That is, shalt be crucified. And to come to this end, Another shall gird thee, and carry thee whither thou wouldest not. First He said what would come to pass, secondly, how it would come to pass. For it was not when crucified, but when about to be crucified, that he was led whither he would not. He wished to be released from the body, and be with Christ; but, if it were possible, he wished to attain to eternal life without the pains of death: to which he went against his will, but conquered by the force of his will, and triumphing over the human feeling, so natural a one, that even old age could not deprive Peter of it. But whatever be the pain of death, it ought to be conquered by the strength of love for Him, Who being our life, voluntarily also underwent death for us. For if there is no pain in death, or very little, the glory of martyrdom would not be great.
CHRYSOSTOM. (Hom. lxxxviii) He says, Whither thou wouldest not, with reference to the natural reluctance of the soul to be separated from the body; an instinct implanted by God to prevent men putting an end to themselves. Then raising the subject, the Evangelist says, This spake He, signifying by what death he should glorify God: not, should die: he expresses himself so, to intimate that to suffer for Christ was the glory of the sufferer. (non occ.). But unless the mind is persuaded that He is very God, the sight of Him can in no way enable us to endure death. Wherefore the death of the saints is certainty of divine glory.
AUGUSTINE. (Tract. cxxiii) He who denied and loved, died in perfect love for Him, for Whom he had promised to die with wrong haste. It was necessary that Christ should first die for Peter’s salvation, and then Peter die for Christ’s Gospel.
Catena Aurea John 21
Catena Aurea by St. Thomas Aguinas
17:20–23
20. Neither pray I for these alone, but for them also which shall believe on me through their word;
21. That they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us: that the world may believe that thou hast sent me.
22. And the glory which thou gavest me I have given them; that they may be one, even as we are one:
23. I in them, and thou in me, that they may be made perfect in one: and that the world may know that thou hast sent me, and hast loved them, as thou hast loved me.
AUGUSTINE. (Tr. cix) When our Lord had prayed for His disciples, whom He named also Apostles, He added a prayer for all others who should believe on Him; Neither pray I for these alone, but for all others who shall believe on Me through their word.
CHRYSOSTOM. (Hom. lxxxii) Another ground of consolation to them, that they were to be the cause of the salvation of others.
AUGUSTINE. (Tr. cix) All, i. e. not only those who were then alive, but those who were to be born; not those only who heard the Apostles themselves, but us who were born long after their death. We have all believed in Christ through their word: for they first heard that word from Christ, and then preached it to others, and so it has come down, and will go down to all posterity. We may see that in this prayer there are some disciples whom He does not pray for; for those, i. e. who were neither with Him at the time, nor were about to believe on Him afterwards through the Apostles’ word, but believed already. Was Nathanael with Him then, or Joseph of Arimathea, and many others, who, John says, believed on Him? I do not mention old Simeon, or Anna the prophetess, Zacharias, Elisabeth, or John the Baptist; for it might be answered that it was not necessary to pray for dead persons, such as these who departed with such rich merits. With respect to the former then we must understand that they did not yet believe in Him, as He wished, but that after His resurrection, when the Apostles were taught and strengthened by the Holy Spirit, they attained to a right faith. The case of Paul however still remains, An Apostle not of men, or by men; (Gal. 1:1) and that of the robber, who believed when even the teachers themselves of the faith fell away. We must understand then, their word, to mean the word of faith itself which they preached to the world; it being called their word, because it was preached in the first instance and principally by them; for it was being preached by them, when Paul received it by revelation from Jesus Christ Himself. And in this sense the robber too believed their word. Wherefore in this prayer the Redeemer prays for all whom He redeemed, both present and to come. And then follows the thing itself which He prays for, That they all may be one. He asks that for all, which he asked above for the disciples; that all both we and they may be one.
CHRYSOSTOM. (Hom. lxxxii) And with this prayer for unanimity, He concludes His prayer; and then begins a discourse on the same subject: A new commandment I give unto you, that ye love one another.
HILARY. (vii de Trin) And this unity is recommended by the great example of unity: As Thou, Father, art in Me, and I in Thee, that they also may be one in Us, i. e. that as the Father is in the Son, and the Son in the Father, so, after the likeness of this unity, all may be one in the Father and in the Son.
CHRYSOSTOM. (Hom. lxxxii) This as again does not express perfect likeness, but only likeness as far as it was possible in men; as when He saith, Be ye merciful, even as your Father, which is in heaven, is merciful. (Luke 6:36)
AUGUSTINE. (Tr. cx) We must particularly observe here, that our Lord did not say, that we may be all one, but that they may be all one, as Thou, Father, in Me, and I in Thee, are one, understood. For the Father is so in the Son, that They are one, because They are of one substance; but we can be one in Them, but not with Them; because we and They are not of one substance. They are in us, and we in Them, so as that They are one in Their nature, we one in ours. They are in us, as God is in the temple; we in Them, as the creature is in its Creator. Wherefore He adds, in Us, to shew, that our being made one by charity, is to be attributed to the grace of God, not to ourselves.
AUGUSTINE. (iv. de. Trin. c. ix) Or that in ourselves we cannot be one, severed from each other by diverse pleasures, and lusts, and the pollution of sin, from which we must be cleansed by a Mediator, in order to be one in Him.
HILARY. (viii. de Trin) Heretics endeavouring to get over the words, I and My Father are one, as a proving unity of nature, and to reduce them to mean a unity simply of natural love, and agreement of will, bring forwards these words of our Lord’s as an example of this kind of unity: That they may be all one, as Thou, Father, art in Me, and I in Thee. But though impiety can cheat its own understanding, it cannot alter the meaning1 of the words themselves. For they who are born again of a nature that gives unity in life eternal, they cease to be one in will merely, acquiring the same nature by their regeneration: but the Father and Son alone are properly one, because God, only-begotten of God, can only exist in that nature from which He is derived.
AUGUSTINE. (Tr. cx) But why does He say, That the world may believe that Thou hast sent Me? Will the world believe when we shall all be one in the Father and the Son? Is not this unity that peace eternal, which is the reward of faith, rather than faith itself? For though in this life all of us who hold in the same common faith are one, yet even this unity is not a means to belief, but the consequence of it. What means then, That all may be one, that the world may believe? He prays for the world when He says, Neither pray I for these alone, but for all those who shall believe on Me through their word. Whereby it appears that He does not make this unity the cause of the world believing, but prays that the world may believe, as He prays that they all may be one. The meaning will be clearer if we always put in the word ask; I ask that they all may be one; I ask that they may be one in Us; I ask that the world may believe that Thou hast sent Me.
HILARY. (viii. de Trin) Or, the world will believe that the Son is sent from the Father, for that reason, viz. because all who believe in Him are one in the Father and the Son.
CHRYSOSTOM. (Hom. lxxxii) For there is no scandal so great as division, whereas unity amongst believers is a great argument for believing; as He said at the beginning of His discourse, By this shall all men know that ye are My disciples, if ye have love one to another. For if they quarrel, they will not be looked on as the disciples of a peacemaking Master. And I, He saith, not being a peacemaker, they will not acknowledge Me as sent from God.
AUGUSTINE. (Tr. cx) Then our Saviour, Who, by praying to the Father, shewed Himself to be man, now shews that, being God with the Father, He doth what He prays for: And the glory which Thou gavest Me, I have given them. What glory, but immortality, which human nature was about to receive in Him? For that which was to be by unchangeable predestination, though future, He expresses by the past tense. That glory of immortality, which He says was given Him by the Father, we must understand He gave Himself also. For when the Son is silent of His own cooperation in the Father’s work, He shews His humility: when He is silent of the Father’s cooperation in His work, He shews His equality. In this way here He neither disconnects Himself with the Father’s work, when He says, The glory which Thou gavest Me, nor the Father with His work, when He says, I have given them. But as He was pleased by prayer to the Father to obtain that all might be one, so now He is pleased to effect the same by His own gift; for He continues, That all may be one, even as We are one.
CHRYSOSTOM. (Hom. lxxxii. 2) By glory, He means miracles, and doctrines, and unity; which latter is the greater glory. For all who believed through the Apostles are one. If any separated, it was owing to men’s own carelessness; not but that our Lord anticipates this happening.
HILARY. (viii. de Trin) By this giving and receiving of honour, then, all are one. But I do not yet apprehend in what way this makes all one. Our Lord, however, explains the gradation and order in the consummating of this unity, when He adds, I in them, and Thou in Me; so that inasmuch as He was in the Father by His divine nature, we in Him by His incarnation, and He again in us by the mystery of the sacrament, a perfect union by means of a Mediator was established.
CHRYSOSTOM. (Hom. lxxxii) Elsewhere1 He says of Himself and the Father, We will come and make Our abode with Him; by the mention of two persons, stopping the mouths of the Sabellians. Here by saying that the Father comes to the disciples through Him, He refutes the notion of the Arians.
AUGUSTINE. (Tr. cx. 4) Nor is this said, however, as if to mean that the Father was not in us, or we in the Father. He only means to say, that He is Mediator between God and man. And what He adds, That they may be made perfect in one, shews that the reconciliation made by this Mediator, was carried on even to the enjoyment of everlasting blessedness. So what follows, That the world may know that Thou hast sent Me, must not be taken to mean the same as the words just above, That the world may believe. For as long as we believe what we do not see, we are not yet made perfect, as we shall be when we have merited to see what we believe. So that when He speaks of their being made perfect, we are to understand such a knowledge as shall be by sight, not such as is by faith. These that believe are the world, not a permanent enemy, but changed from an enemy to a friend; as it follows: And hast loved them, as Thou hast loved Me. The Father loves us in the Son, because He elected us in Him. These words do not prove that we are equal to the Only Begotten Son; for this mode of expression, as one thing so another, does not always signify equality. It sometimes only means, because one thing, therefore another. And this is its meaning here: Thou hast loved them, as Thou hast loved Me, i. e. Thou hast loved them, because Thou hast loved Me. There is no reason for God loving His members, but that He loves him. But since He hateth nothing that He hath made, who can adequately express how much He loves the members of His Only Begotten Son, and still more the Only Begotten Himself.
17:24–26
24. Father, I will that they also, whom thou hast given me, be with me where I am; that they may behold my glory, which thou hast given me: for thou lovedst me before the foundation of the world.
25. O righteous Father, the world hath not known thee: but I have known thee, and these have known that thou hast sent me.
26. And I have declared unto them thy name, and will declare it: that the love wherewith thou hast loved me may be in them, and I in them.
CHRYSOSTOM. (Hom. lxxxii. 2) After He has said that many should believe on Him through them, and that they should obtain great glory, He then speaks of the crowns in store for them; Father, I will that they also whom Thou hast given Me, be with Me where I am.
AUGUSTINE. (Tr. cxi. 1) These are they whom He has received from the Father, whom He also chose out of the world; as He saith at the beginning of this prayer, Thou hast given Him power over all flesh, i. e. all mankind, That He should give eternal life to as many as Thou hast given Him. Wherein He shews that He had received power over all men, to deliver whom He would, and to condemn whom He would. Wherefore it is to all His members that He promises this reward, that where He is, they may be also. Nor can that but be done, which the Almighty Son saith that He wishes to the Almighty Father: for the Father and the Son have one will, which, if weakness prevent us from comprehending, piety must believe. Where I am: so far as pertains to the creature, He was made of the seed of David according to the flesh: He might say, Where I am, meaning where He was shortly to be, i. e. heaven. In heaven then, He promises us, we shall be. For thither was the form of a servant raised, which He had taken from the Virgin, and there placed on the right hand of God.
GREGORY. (Moral.) What means then what the Truth saith above, No man hath ascended into heaven, but He that came down from heaven, even the Son of man which is in heaven. (John 3:13) Yet here is no discrepancy, for our Lord being the Head of His members, the reprobates excluded, He is alone with us. And therefore, we making one with Him, whence He came alone in Himself, thither He returns alone in us.
AUGUSTINE. (Tr. cxi) But as respects the form of God, wherein He is equal to the Father, if we understand these words, that they may be with Me where I am, with reference to that, then away with all bodily ideas, and enquire not where the Son, Who is equal to the Father, is: for no one hath discovered where He is not. Wherefore it was not enough for Him to say, I will that they may be where I am, but He adds, with Me. For to be with Him is the great good: even the miserable can be where He is, but only the happy can be with Him. And as in the ease of the visible, though very different be whatever example we take, a blind man will serve for one, as a blind man though He is where the light is, yet is not himself with the light, but is absent from it in its presence, so not only the unbelieving, but the believing, though they cannot be where Christ is not, yet are not themselves with Christ by sight: by faith we cannot doubt but that a believer is with Christ. But here He is speaking of that sight wherein we shall see Him as He is; as He adds, That they may behold My glory, which Thou hast given Me. That they may behold, He says, not, that they may believe. It is the reward of faith which He speaks of, not faith itself.
CHRYSOSTOM. (Hom. lxxxii) He saith not, that they may partake of My glory, but, that they may behold, intimating that the rest there is to see the Son of God. The Father gave Him glory, when He begat Him.
AUGUSTINE. (Tr. cxi. 3) When then we shall have seen the glory which the Father gave the Son, though by this glory we do not understand here, that which He gave to the equal Son when He begat Him, but that which He gave to the Son of man, after His crucifixion; then shall the judgment be, then shall the wicked be taken away, that he see not the glory of the Lord: what glory but that whereby He is God? If then we take their words, That they may be with Me where I am, to be spoken by Him as Son of God, in that case they must have a higher meaning, viz. that we shall be in the Father with Christ. As He immediately adds, That they may see My glory which Thou hast given Me; and then, Which Thou gavest Me before the foundation of the world. For in Him He loved us before the foundation of the world, and then predestined what He should do at the end of the world.
BEDE. That which He calls glory then is the love wherewith He was loved with the Father before the foundation of the world. And in that glory He loved us too before the foundation of the world.
THEOPHYLACT. After then that He had prayed for believers, and promised them so many good things, another prayer follows worthy of His mercy and benignity: O righteous Father, the world hath not known Thee; as if to say, I would wish that all men obtained these good things, which I have asked for the believing. But inasmuch as they have not known Thee, they shall not obtain the glory and crown.
CHRYSOSTOM. (Hom. lxxxii) He says this as if He were troubled at the thought, that they should be unwilling to know One so just and good. And whereas the Jews had said, that they knew God, and He knew Him not: He on the contrary says, But I have known Thee, and these have known that Thou hast sent Me, and I have declared unto them Thy name, and will declare1 it, by giving them perfect knowledge through the Holy Ghost. When they have learned what Thou art, they will know that I am not separate from Thee, but Thine own Son greatly beloved, and joined to Thee. This I have told them, that I might receive them, and that they who believe this aright, shall preserve their faith and love toward Me entire; and I will abide in them: That the love wherewith Thou hast loved Me may be in them, and I in them.
AUGUSTINE. (Tr. cxi. 5) Or thus; What is to know Him, but eternal life, which He gave not to a condemned but to a reconciled world? For this reason the world hath not known Thee; because Thou art just, and hast punished them with this ignorance of Thee, in reward for their misdeeds. And for this reason the reconciled world knows Thee, because Thou art merciful, and hast vouchsafed this knowledge, not in consequence of their merits, but of thy grace. It follows: But I have known Thee. He is God the fountain of grace by nature, man of the Holy Ghost and Virgin by grace ineffable. Then because the grace of God is through Jesus Christ, He says, And they have known Me, i. e. the reconciled world have known Me, by grace, forasmuch as Thou hast sent Me. And I have made known Thy name to them by faith, and will make it known by sight: that the love wherewith Thou hast loved Me may be in them. (2 Tim. 4:7) The Apostle uses a like phrase, I have fought a good fight, by a good fight being the more common form. The love wherewith the Father loveth the Son in us, can only be in us because we are His members, and we are loved in Him when He is loved wholly, i. e. both head and body. And therefore He adds, And I in them; He is in us, as in His temple, we in Him as our Head.
Catena Aurea John 17
From: John 21:15-19Peter's Primacy
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[15] 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." [16] A second time He said to him, "Simon, son of John, do you love Me?" He said to Him, "Yes, Lord, you know I love You." He said to him, "Tend My sheep." [17] He said to him the third time, "Simon, son of John, do you love Me?" Peter was grieved because He said to him the 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. [18] Truly, truly I say to you, when you were young, you girded yourself and walked where you would; but when you are old, you will stretch out your hands, and another will gird you and carry you where you do not wish to go." [19] (This He said to show by what death he was to glorify God.) And after this He said to him, "Follow Me."
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Commentary:
15-17. Jesus Christ had promised Peter that he would be the primate of the Church (cf. Matthew 16:16-19 and note on the same). Despite his three denials during our Lord's passion, Christ now confers on him the primacy He promised.
"Jesus questions Peter, three times, as if to give him a triple chance to atone for his triple denial. Peter has learned his lesson from the bitter experience of his wretchedness. Aware of his weakness, he is deeply convinced that rash claims are pointless. Instead he puts everything in Christ's hands. `Lord, You know well that I love You" ([St] J. Escriva, "Friends of God", 267). The primacy was given to Peter directly and immediately. So the Church has always understood--and so Vatican I defined: "We therefore teach and declare that, according to the testimony of the Gospel, the primacy of jurisdiction over the universal Church of God was immediately and directly promised and given to Blessed Peter the Apostle by Christ our Lord. [...] And it was upon Simon Peter alone that Jesus after His resurrection bestowed the jurisdiction of chief pastor and ruler over all His fold in the words: "Feed My lambs; feed My sheep" ("Pastor Aeternus", Chapter 1).
The primacy is a grace conferred on Peter and his successors, the popes; it is one of the basic elements in the Church, designed to guard and protect its unity: "In order that the episcopate also might be one and undivided, and that [...] the multitude of the faithful might be kept secure in the oneness of faith and communion, He set Blessed Peter over the rest of the Apostles, and fixed in him the abiding principle of this twofold unity, and its visible foundation" ("Pastor Aeternus, Dz-Sch 3051"; cf. Vatican II, "Lumen Gentium", 18). Therefore, the primacy of Peter is perpetuated in each of his successors: this is something which Christ disposed; it is not based on human legislation or custom.
By virtue of the primacy, Peter, and each of his successors, is the shepherd of the whole Church and vicar of Christ on earth, because he exercises vicariously Christ's own authority. Love for the Pope, whom St. Catherine of Siena used to call "the sweet Christ on earth", should express itself in prayer, sacrifice and obedience.
18-19. According to Tradition, St. Peter followed his Master to the point of dying by crucifixion, head downwards, "Peter and Paul suffered martyrdom in Rome during Nero's persecution of Christians, which took place between the years 64 and 68. St. Clement, the successor of the same Peter in the See of the Church of Rome, recalls this when, writing to the Corinthians, he puts before them `the generous example of these two athletes': `due to jealousy and envy, those who were the principal and holiest columns suffered persecution and fought the fight unto death'" (Pope Paul VI, "Petrum Et Paulum").
"Follow Me!": these words would have reminded the Apostle of the first call he received (cf. Matthew 4:19) and of the fact that Christ requires of His disciples complete self-surrender: "If any man would come after Me, let him deny himself and take up the Cross daily and follow Me" (Luke 9:23). St. Peter himself, in one of his letters, also testifies to the Cross being something all Christians must carry: "For to this you have been called, because Christ also suffered for you, leaving you an example, that you should follow in His steps" (1 Peter 2:21).
