The apostles chosen by Jesus, and who were supposed to have received from him a special mandate to announce to the world the kingdom of God, had, in the little community, an incontestable superiority. One of the first cares, as soon as they saw the sect settle quietly down at Jerusalem, was to fill the vacancy that Judas of Kerioth had left in its ranks. The opinion that the latter had betrayed his master, and had been the cause of his death, became more and more general. The legend was mixed up with him, and every day one heard of some new circumstance which enhanced the black-heartedness of his deed. In order to replace him, it was resolved to have recourse to a vote of some sort. The sole condition was that the candidate should be chosen from the groups of the oldest disciples, who had been witnesses of the whole series of events, from the time of the baptism of John. This reduced considerably the number of those eligible. Two only were found in the ranks, Joseph Bar-Saba, who bore the name of Justus, and Matthias. The lot fell upon Matthias, who was accounted as one of the Twelve. But this was the sole instance of such a replacing. The body of Twelve lived, generally, permanently at Jerusalem. Till about the year 60 the apostles did not leave the holy city except upon temporary missions. This explains the obscurity in which the majority of the members of the central council remained. Very few of them had a _rôle_. This council was a kind of sacred college or senate, destined only to represent tradition and a spirit of conservatism. It finished by being relieved of every active function, so that its members had nothing to do but to preach and pray; but as yet the brilliant feats of preaching had not fallen to their lot. Their names were hardly known outside Jerusalem, and about the year 70 or 80 the lists which were given of these chosen Twelve agreed only in the principal names. The "Brothers of the Lord" appear often by the side of the "apostles," although they were distinct from them. Their authority, however, was equal to that of the apostles. Here two groups constituted, in the nascent Church, a sort of aristocracy founded solely on the more or less intimate relations that their members had had with the Master. These were the men whom Paul denominated "the pillars" of the Church at Jerusalem. For the rest, we see that no distinctions in the ecclesiastical hierarchy yet existed. The title was nothing; the personal authority was everything. The principle of ecclesiastical celibacy was already established, but it required time to bring all these germs to their complete development. Peter and Philip were married and had sons and daughters.