15 From this it must be clearly understood that Bishops are deprived of the right and power of ruling, if they deliberately secede from Peter and his successors; because, by this secession, they are separated from the foundation on which the whole edifice must rest. They are therefore outside the edifice itself; and for this very reason they are separated from the fold , whose leader is the Chief Pastor; they are exiled from the Kingdom , the keys of which were given by Christ to Peter alone. These things enable us to see the heavenly ideal, and the divine exemplar, of the constitution of the Christian commonwealth, namely: When the Divine founder decreed that the Church should be one in faith, in government, and in communion, He chose Peter and his successors as the principle and centre, as it were, of this unity. Wherefore St. Cyprian says: "The following is a short and easy proof of the faith. The Lord saith to Peter: 'I say to thee thou art Peter'; on him alone He buildeth His Church; and although after His Resurrection He gives a similar power to all the Apostles and says: 'As the Father hath sent me,' &c., still in order to make the necessary unity clear, by His own authority He laid down the source of that unity as beginning from one" ( De Unit. Eccl ., n. 4). And Optatus of Milevis says: "You cannot deny that you know that in the city of Rome the Episcopal chair was first conferred on Peter. In this Peter, the head of all the Apostles (hence his name Cephas), has sat; in which chair alone unity was to be preserved for all, lest any of the other apostles should claim anything as exclusively his own. So much so, that he who would place another chair against that one chair, would be a schismatic and a sinner" ( De Schism. Donat. , lib. ii). Hence the teaching of Cyprian, that heresy and schism arise and are begotten from the fact that due obedience is refused to the supreme authority. "Heresies and schisms have no other origin than that obedience is refused to the priest of God, and that men lose sight of the fact that there is one judge in the place of Christ in this world" (Epist. xii. ad Cornelium , n. 5). No one, therefore, unless in communion with Peter can share in his authority, since it is absurd to imagine that he who is outside can command in the Church. Wherefore Optatus of Milevis blamed the Donatists for this reason: "Against which ages (of hell) we read that Peter received the saving keys, that is to say, our prince, to whom it was said by Christ: `To thee will I give the keys of the Kingdom of Heaven, and the gates of Hell shall not conquer them.' Whence is it therefore that you strive to obtain for yourselves the keys of the Kingdom of Heaven-you who fight against the chair of Peter?" (Lib. ii., n. 4-5). But the Epsicopal order is rightly judged to be in communion with Peter, as Christ commanded, if it be subject to and obeys Peter; otherwise it necessarily becomes a lawless and disorderly crowd. It is not sufficient for the due preservation of the unity of the faith that the head should merely have been charged with the office of superintendent, or should have been invested solely with a power of direction. But it is absolutely necessary that he should have received real and sovereign authority which the whole community is bound to obey. What had the Son of God in view when he promised the keys of the Kingdom of Heaven to Peter alone ? Biblical usage and the unanimous teaching of the Fathers clearly show that supreme authority is designated in the passage by the word keys . Nor is it lawful to interpret in a different sense what was given to Peter alone, and what was given to the other Apostles conjointly with him. If the power of binding, loosening, and feeding confers upon each and every one of the Bishops the successors of the Apostles a real authority to rule the people committed to him, certainly the same power must have the same effect in his case to whom the duty of feeding the lambs and sheep has been assigned by God. "Christ constituted [Peter] not only pastor, but pastor of pastors; Peter therefore feeds the lambs and feeds the sheep, feeds the children and feeds the mothers, governs the subjects and rules the prelates, because the lambs and the sheep form the whole of the Church" (S. Brunonis Episcopi Signiensis Comment. in Joan ., part iii., cap. 21, n. 55). Hence those remarkable expressions of the ancients concerning St. Peter, which most clearly set forth the fact that he was placed in the highest degree of dignity and authority. They frequently call him "the Prince of the College of the Disciples; the Prince of the holy Apostles; the leader of that choir; the mouthpiece of all the Apostles; the head of that family; the ruler of the whole world; the first of the Apostles; the safeguard of the Church." In this sense St. Bernard writes as follows to Pope Eugenius: "Who art thou? The great priest - the high priest. Thou art the Prince of Bishops and the heir of the Apostles. . . . Thou art he to whom the keys were given. There are, it is true, other gatekeepers of heaven and to pastors of flocks, but thou are so much the more glorious as thou bast inherited a different and more glorious name than all the rest. They have flocks consigned to them, one to each; to thee all the flocks are confided as one flock to one shepherd, and not alone the sheep, but the shepherds. You ask how I prove this? From the words of the Lord. To which - I do not say - of the Bishops, but even of the Apostles have all the sheep been so absolutely and unreservedly committed? If thou lovest me, Peter, feed my sheep. Which sheep? Of this or that country, or kingdom? My sheep, He says: to whom therefore is it not evident that he does not designate some, but all? We can make no exception where no distinction is made" ( De Consideratione , lib. ii., cap. 8). But it is opposed to the truth, and in evident contradiction with the divine constitution of the Church, to hold that while each Bishop is individually bound to obey the authority of the Roman Pontiffs, taken collectively the Bishops are not so bound. For it is the nature and object of a foundation to support the unity of the whole edifice and to give stability to it, rather than to each component part ; and in the present case this is much more applicable, since Christ the Lord wished that by the strength and solidity of the foundation the gates of hell should be prevented from prevailing against the Church. All are agreed that the divine promise must be understood of the Church as a whole, and not of any certain portions of it. These can indeed be overcome by the assaults of the powers of hell, as in point of fact has befallen some of them. Moreover, he who is set over the whole flock must have authority, not only over the sheep dispersed throughout the Church, but also when they are assembled together. Do the sheep when they are all assembled together rule and guide the shepherd? Do the successors of the Apostles assembled together constitute the foundation on which the successor of St. Peter rests in order to derive therefrom strength and stability? Surely jurisdicton and authority belong to him in whose power have been placed the keys of the Kingdom taken collectively. And as the Bishops, each in his own district, command with real power not only individuals but the whole community, so the Roman pontiffs, whose jurisdiction extends to the whole Christian commonwealth, must have all its parts, even taken collectively, subject and obedient to their authority. Christ the Lord, as we have quite sufficiently shown, made Peter and his successors His vicars , to exercise for ever in the Church the power which He exercised during His mortal life. Can the Apostolic College be said to have been above its master in authority? This power over the Episcopal College to which we refer, and which is clearly set forth in Holy Writ, has ever been acknowledged and attested by the Church, as is clear from the teaching of General Councils. "We read that the Roman Pontiff has pronounced judgments on the prelates of all the churches; we do not read that anybody has pronounced sentence on him" (Hadrianus ii., in Allocutione iii., ad Synodum Romanum an. 869, Cf. Actionem vii., Conc. Constantinopolitani iv). The reason for which is stated thus: "there is no authority greater than that of the Apostolic See" (Nicholaus in Epist. lxxxvi. ad Michael. Imperat.) wherefore Gelasius on the decrees of Councils says: "That which the First See has not approved of cannot stand; but what it has thought well to decree has been received by the whole Church" (Epist. xxvi., ad Episcopos Dardaniae , n. 5). It has ever been unquestionably the office of the Roman Pontiffs to ratify or to reject the decrees of Councils. Leo the great rescinded the acts of the Conciliabulum of Ephesus. Damasus rejected those of Rimini, and Hadrian I. those of Constantinople. The 28th Canon of the Council of Chalcedon, by the very fact that it lacks the assent and approval of the Apostolic See, is admitted by all to be worthless. Rightly, therefore, has Leo X. laid down in the 5th council of Lateran "that the Roman Pontiff alone, as having authority over all Councils, has full jurisdiction and power to summon, to transfer, to dissolve Councils, as is clear, not only from the testimony of Holy Writ, from the teaching of the Fathers and of the Roman Pontiffs, and from the decrees of the sacred canons, but from the teaching of the very Councils themselves." Indeed, Holy Writ attests that the keys of the Kingdom of Heaven were given to Peter alone, and that the power of binding and loosening was granted to the Apostles and to Peter; but there is nothing to show that the Apostles received supreme power without Peter , and against Peter . Such power they certainly did not receive from Jesus Christ. Wherefore, in the decree of the Vatican Council as to the nature and authority of the primacy of the Roman Pontiff, no newly conceived opinion is set forth, but the venerable and constant belief of every age (Sess. iv., cap. 3). Nor does it beget any confusion in the administration that Christians are bound to obey a twofold authority. We are prohibited in the first place by Divine Wisdom from entertaining any such thought, since this form of government was constituted by the counsel of God Himself. In the second place we must note that the due order of things and their mutual relations are disturbed if there be a twofold magistracy of the same rank set over a people, neither of which is amenable to the other. But the authority of the Roman Pontiff is supreme, universal, independent; that of the bishops limited, and dependent. "It is not congruous that two superiors with equal authority should be placed over the same flock; but that two, one of whom is higher than the other, should be placed over the same people is not incongruous. Thus the parish priest, the bishop, and the Pope, are placed immediately over the same people" (St. Thomas in iv Sent, dist. xvii., a. 4, ad q. 4, ad 3). So the Roman Pontiffs, mindful of their duty, wish above all things, that the divine constitution of the Church should be preserved. Therefore, as they defend with all necessary care and vigilance their own authority, so they have always laboured, and will continue to labour, that the authority of the bishops may be upheld. Yea, they look up whatever honour or obedience is given to the bishops as paid to themselves. "My honour is the honour of the Universal Church. My honour is the strength and stability of my brethren. Then am I honoured when due honour is given to everyone" (S. Gregorius M. Epistolarum , lib viii., ep. xxx., ad Eulogium).
Source: Satis Cognitum (Vatican.va)