Unless, indeed, sixthly, they allow themselves to be forced out of their prejudice by the Scriptures exhibiting such a Primacy of Peter as compels all others to profess one and the same faith with him, and to maintain one and the same society. For such an obligation could proceed neither from titles of honour, nor from precedency. It demanded a stronger cause—none other, in fact, but that supreme authority by which Peter is made head of all.

But we shall feel much more at home in the truth of this deduction, if we enquire a little more deeply into the reasons for selecting one among the rest, namely Peter, and instituting the Primacy. For the purpose, and end proposed in a work, have the force of a negative rule by which we may judge with certainty what ought to be done, or could not be left undone. I know well that it does not follow, if anything has been instituted for a certain purpose, that it ought to be endowed only with those properties which appear necessary for the end to be gained; for it may be much more munificently established than the absolute need required. But at the same time I know that there would be a failure in prudence and wisdom in one who, desiring a certain work for a specific end, did not provide it with everything that could be deemed necessary. Thus the knowledge of the intention and purpose is equivalent, if not to a positive rule, determining all and singular the powers bestowed on any institution, at least to a negative, ascertaining what must be given to it, and what cannot be denied to it.

Now is the purpose for which Christ instituted the Primacy, and honoured Peter with its dignity, unknown, or is it most truly ascertained? The end which moved Christ to make the college of Apostles unequal, and to set Peter as head over it, is it secret, or very conspicuous? There are in all three classes of reasons which enable us to form, not a mere guess, but an ascertained judgment, as to the purpose of Christ in instituting the Primacy. There are typical reasons, drawn from previous shadowings forth of it: there are analogical, derived from relations of resemblance; and there are real, inherent in the testimonies themselves, and the Church's endowments. Let us briefly exhibit these in order.

I. By, then, that signal agreement wherewith the two dispensations, the old and the new, correspond to each other, the first in outline, and the last as filled up, this rudimental, and that complete, we are plainly instructed that it was Christ's purpose for Peter, in the new dispensation, to bear the character, whose lineaments had been traced before in Abraham, and to be eminent among the Apostles, for the prerogative which Abraham had possessed among the Patriarchs. Now Abraham's special prerogative, and pre-eminence, was this, that no one could share either promise, whether carnal or spiritual, which is expressed in Scripture, by "the Blessing," who was not joined with Abraham by a double, that is, a carnal and spiritual, a physical and moral, bond. For to him and to his seed were the promises made, with the condition, that only by conjunction with him, and with his seed, they could flow over to the rest. Since, then, in the new dispensation, Peter was to sustain the character of Abraham in the old, and since the only-begotten Son of the Father, having put on the form of a servant, granted to Peter the prerogative which, in prelude of His future order, He had given to Abraham, it is plain that Simon was chosen, honoured with the name of Cephas, and preferred above all, in order that from him as supreme minister of Christ, and by union with him as visible head, all the members of the Church's body might enjoy the blessings and fruits of the Christian institution.

The deductions from this are easy to see. For two things chiefly follow, specially declarative of the nature of the Primacy, and shewing its intent, to be the cause and efficient principle of that unity by which the Church of Christ is one visible body. First, there follows the duty laid upon all the faithful, of being joined with Peter, if they would not fall from those promises with which Christ has most bountifully enriched His mystical Body, being no other than that which reverences Peter as its visible head. Secondly, there follows Peter's jurisdiction, in virtue of which he enjoins all to form one communion and society with him, as well as effects, defends, and maintains it. Now, nothing can be stronger than this ordinance of Christ, either to prove a Primacy of supreme jurisdiction, or to unfold its purpose of effecting and maintaining unity.

The same is the bearing of another type no less remarkable, and no less adopted to explain the whole matter. For, as Israel, "according to the flesh," was the shadow of the "Israel of God," which was "according to promise:"[3] and as the kingdom of Israel was a type and ensample of the kingdom of heaven, the approach of which Christ proclaimed in these words, "The time is fulfilled, and the kingdom of heaven is at hand:" so the twelve sons of Israel, the heads of the Israelitish race, represented and imaged out those Twelve whom Christ chose, made princes in His Church, and endowed with supreme authority to build up that Church's structure, and enrich it day by day with new accessions of spiritual children. Of this type our Lord's words are the strongest guarantee: "Amen, I say unto you, that you who have followed Me, in the regeneration, when the Son of Man shall sit on the throne of His Majesty, you also shall sit on twelve thrones, judging the twelve tribes of Israel." And, again, in the very discourse where He sets forth the future Superior, "I dispose to you, as My Father disposed to Me, a kingdom; that you may eat and drink at My table, in My kingdom; and may sit upon thrones, judging the twelve tribes of Israel."[4]

But now, though all the sons of Israel in the former typical kingdom were chiefs, and heads of tribes, yet one of them, that is Judah, had a special prerogative, which the Scriptures set forth, and which was called the right of the first-born. In virtue of this, on the one hand, Judah was esteemed the Lord of his brethren, whom they were to reverence as the parent of the whole family, and on the other, it was only by union with him, and with the seed that was to spring from him, that the other chiefs could promise to themselves the divine blessing. And so the tribe of Judah had a great pre-eminence over the other eleven. It was its prerogative to take the[5] lead: it had received from God the promise of an[6] authority which was not to terminate before the old covenant should be transformed into the new: from it was the seed[6] to be expected, which should be the source of blessing to all nations, prefigured as they were by the twelve tribes; the other tribes were bound[7] to union with it, and to the profession of its religion, on pain of falling into schism, and forfeiting the divine covenant. All this was expressed by Jacob in prophetic inspiration, when he addressed Judah as the head and root of his line: "Judah (praise) art thou, thy brethren shall praise thee: thy hand is on the neck of thine enemies: the sons of thy father shall bow down to thee." It remains, then, to ask, who was to represent Judah's person in the new kingdom, and on whom Christ bestowed the prerogative, the type and image of which had gone before in Judah. It is most plain that this was Simon Peter, for whom we have, therefore, to claim a double prerogative, the one of being the source and origin, from which no one may be separated without severance from the kingdom and promises of Christ: the other of being the first-born, as betokening excellence, by which he was pre-eminent in the possession of special rights among his brethren, the Apostles.

The former prerogative was expressed by the Fathers of Aquileia, when, in the words of S. Ambrose, they stated their belief in S. Peter's chair, "For thence, as from a fountain head, the rights of venerable communion flow unto[8] all." The latter is confirmed and illustrated by the solemn expressions so often recurring in Christian records, wherein Peter is called, "[9]the Bishop of Bishops," "[10]the Pastor of Pastors," "[11]first prelate of the Apostles," "[12]Patriarch of the whole world," "[13]universal bishop," "[14]father of fathers," "[14]having the dignity of pastoral headship," "[14]the most divine head of all heads, arch-pastor of the Church."

II. To these reasons, which, as we think, may be called typical, succeed the analogical, which prove with equal evidence the purpose of the Primacy as instituted, and its inherent powers. If we ask what are these reasons from analogy, and to what they point, one only answer can be given commended by any show of truth, that the Primacy was instituted in order that the Church of Christ might seem to be moulded after the analogy of one human body, one house, one kingdom, one city, and one fold. But whence the need that so very remarkable and clear an analogy should be obtained by the institution of the Primacy? Doubtless because the Primacy was created as a principle, by whose virtue and efficiency what was various and manifold should be gathered up into unity, because it was to be a head in which all the diverse members of the ecclesiastical body should be joined, the centre of the Church's circle.

Therefore the reasons drawn from analogy show that the unity of the Church is to be considered the special end for which the Primacy was instituted, and the Primacy itself a principle abundantly provided with all those means by which so admirable a blessing as unity may be first produced and then maintained.