He that abideth not in the unity of the church, doth he
believe that he holdeth to the faith? He that struggleth against and resisteth this church, he that deserteth the Chair of St. Peter, upon which the church is founded, can he have any assurance that he is in the church? . . . Likewise . . . Paul teacheth the sacrament of unity saying: "There is one body and one spirit and one hope of our calling; one Lord, one faith, one baptism, one God." . . . The episcopate is indeed one . . . the church also is one . . . there is also but one head and one source. . . . Whoever is excluded from the church . . . is severed from the promises of the church. . . . He is a stranger, an outcast, and enemy. He cannot have God for his father, who hath not the church for his mother. . . . He that doth not hold this unity doth not hold the law of God . . . he partaketh not of life or of salvation.[158:1]
The power of excommunication to preserve the doctrinal unity and purity of the Church implied some share in appointment and administration. From the very beginning, no doubt, the Bishop of Rome had ordained all provincial bishops, and few matters of great importance had been transacted without his consent or approval.[158:2]
The same tendencies and influences that led to the evolution of the bishop in the early local churches for the sake of order and efficiency, produced a centralisation of power in the universal Church. With the growth of the idea that the Church had an outward organisation developed the conscious need of a supreme bishop who could rule the Church somewhat as the Emperor ruled the state. That such a unifying authority was generally understood to exist by the time of Cyprian seems very clear from contemporary
testimony. But it took two hundred and fifty years to develop that leadership. There were not wanting, either, on all sides evidences of earlier local independence. The rise of the Papacy was the logical culmination of the episcopal system. It must be remembered that by the time of Bishop Cyprian the Church had undergone a series of wonderful changes. The Church had spread outwardly until the whole Empire was covered and included all ranks. The Church had come to be naturalised in the Empire and was gradually compromising with conditions. Some conception of the part Christianity was to play in the world began to dawn on men's minds. The ascendency of the See of St. Peter was regarded, therefore, quite generally as a necessity.
11. The centralisation of wealth in Rome rendered the Church there the wealthiest in Christendom. These riches were lavishly used, during the first three hundred years, to aid the poorer communities.[159:1] Such favours could not be solicited, or received, without an appreciable sacrifice of independence on the part of the recipients. Ignatius, considering the munificence of the Roman Church, and wishing to confer some special distinction, calls her "the fostering mistress of charity."[159:2]
12. From the time of Peter to Constantine the Great, thirty-two bishops occupied the chair of the Prince of Apostles. The number and character of the members of the Roman Church led to the selection of the ablest of the Western Christians to occupy that important office. These successive bishops, from the weight of their personal influence, transmitted a gradually increasing power. The labours of a few of these remarkable
men who filled the Roman See, like Clement, Victor, Callistus, and Stephen, helped powerfully to lay the foundations for the Papacy. Clement's attitude was "almost imperious." Victor in his presumption on the Easter question, Zephyrinus on the assumption of his proud title of Pontifex Maximus and Bishop of Bishops, Callistus concerning lapsed heretics, and Stephen on the baptism of heretics, were all guilty of "hierarchical arrogance."[160:1] Cyprian (d. 258) looked upon Rome as the Cathedra Petri and the Roman Church as the head of the universal Church.[160:2] Thus it may be accepted as an established fact that the Bishop of Rome was generally accepted as Peter's successor, at least in the West, when Emperor Constantine legalised the Christian religion and made it free to complete its organisation and to carry on its propagandism openly. He also increased the wealth and power of the Roman See and made its bishop the undisputed head of the Western Church. At the same time, in removing his capital to Constantinople, Constantine permitted the Roman Bishop to assume imperial prerogatives and encouraged the completion of the Church organisation after the imperial model.
A comparison of the Church in 313 with the Apostolic Church reveals the fact that many pronounced changes and developments had occurred. In extent the Roman Church had spread from the Eternal City over the entire Italian peninsula and then to Spain, France, England, Germany, and Africa, and numbered perhaps 10,000,000 members. In organisation the Church had changed from a democracy to an absolute monarchy, from many local centres of authority to one great
world power based on an imperial hierarchy, from communism to paternalism, from decentralisation to centralisation, from apostolic simplicity to worldly grandeur, and from a spiritual organisation to one largely political. The spiritual shepherd of the flock at Rome had come to claim and to exercise superior prerogatives over Western Europe and to serve the Roman Emperor as virtually his spiritual adviser. In wealth and culture, too, the Church had become a powerful social, industrial, and educational factor.