II. Accordingly the pre-eminence of Peter is well expressed by the words,[49] "Primacy of faith," "chiefship of faith," "chiefship in the episcopate of faith," meaning thereby a peculiar authority to prescribe the faith, and determine its profession, and so protect its unity and purity. This is conveyed in the words of Christ, confirm thy brethren. Thus[50] S. Bernard addressed Innocent II., "All emergent dangers and scandals in the kingdom of God, specially those which concern the faith, are to be referred to your Apostolate. For I conceive that we should look especially for reparation of the faith to the spot where faith _cannot_[51] fail. That indeed is the prerogative of this see. For to whom else was it once said, 'I have prayed for thee, Peter, that thy faith fail not?' Therefore what follows is required of Peter's successor: 'And thou in thy turn one day confirm thy brethren.' And this is now necessary. It is time for you, most loving father, to recognise your chiefship, to approve your zeal, and so make your ministry honoured. In that you clearly fulfil the part of Peter, whose seat you occupy, if by your admonition you confirm hearts fluctuating in faith, if by your authority you crush those who corrupt it." III. All who have received the ministry of the word, and the charge of defending the faith and preserving unity, and are "ambassadors in Christ's name," have a claim to be listened to, but he above all who holds the chiefship of faith, and who received the charge, "Confirm thy brethren." He therefore must be the supreme standard of faith, which is just what S. Peter Chrysologus, in the fifth century, wrote to Eutyches: "We exhort you in all things, honourable brother, to pay obedience to what is written by the most blessed Pope of the Roman city; for S. Peter, who both lives and rules in his own see, grants to those who ask for it the truth of faith."[52] IV. And in this prerogative of Peter, to be heard above all others, we find the meaning of certain ancient expressions. Thus [53]Prudentius calls him, "the first disciple of God;" [54]S. Augustine, "the figure of the Church;" [55]S. Chrysostome, "the mouthpiece of the disciples, and teacher of the world;" [56]S. Ephrem Syrus, "the candle, the tongue of the disciples, and the voice of preachers;" [57]S. Cyril of Jerusalem, "the prince of the Apostles, and the highest preacher of the truth." In these and such like continually recurring expressions we recognise his chiefship in the episcopate of faith, his being the standard of faith, and his representing the Catholic faith, as the branches are gathered up in the root, and the streamlets in the fountain.