7 Let no one, however, separate these distinguished apostles. In that which was signified by Peter, they were both alike; and in that which was signified by John, they will both be alike hereafter. In their representative character, the one was following, the other tarrying; but in their personal faith they were both of them enduring the present evils of the misery here, both of them expecting the future good things of the blessedness to come. And such is the case, not with them alone, but with the holy universal Church, the spouse of Christ, who has still to be rescued from the present trials, and to be preserved in the future happiness. And these two states of life were symbolized by Peter and John, the one by the one, the other by the other; but in this life they both of them walked for a time by faith, and the other they shall both of them enjoy eternally by sight. For the whole body of the saints, therefore, inseparably belonging to the body of Christ, and for their safe pilotage through the present tempestuous life, did Peter, the first of the apostles, receive the keys of the kingdom of heaven for the binding and loosing of sins; and for the same congregation of saints, in reference to the perfect repose in the bosom of that mysterious life to come did the evangelist John recline on the breast of Christ. For it is not the former alone but the whole Church, that binds and looses sins; nor did the latter alone drink at the fountain of the Lord's breast, to emit again in preaching, of the Word in the beginning, God with God, and those other sublime truths regarding the divinity of Christ, and the Trinity and Unity of the whole Godhead. which are to be yet beheld in that kingdom face to face, but meanwhile till the Lord's coming are only to be seen in a mirror and in a riddle; but the Lord has Himself diffused this very gospel through the whole world, that every one of His own may drink thereat according to his own individual capacity. There are some who have entertained the idea— and those, too, who are no contemptible handlers of sacred eloquence— that the Apostle John was more loved by Christ on the ground that he never married a wife, and lived in perfect chastity from early boyhood. There is, indeed, no distinct evidence of this in the canonical Scriptures: nevertheless it is an idea that contributes not a little to the suitableness of the opinion expressed above, namely, that that life was signified by him, where there will be no marriage.
8. “This is the disciple who testifies of these things, and wrote these things; and we know that his testimony is true. And there are also,” he adds, “many other things which Jesus did, the which, if they should be written every one, I suppose that even the world itself could not contain the books that should be written.” We are not to suppose that in regard to local space the world would be unable to contain them; for how could they be written in it if it could not bear them when written? But perhaps it is that they could not be comprehended by the capacity of the readers: although, while our faith in certain things themselves remains unharmed, the words we use about them may not unfrequently appear to exceed belief. This will not take place when anything that was obscure or dubious is in course of exposition by the setting forth of its ground and reason, but only when that which is clear of itself is either magnified or extenuated, without any real departure from the pathway of the truth to be intimated; for the words may outrun the thing itself that is indicated only in such a way, that the will of him that speaks, but without any intention to deceive, may be apparent, so that, knowing how far he will be believed, he, orally, either diminishes or magnifies his subject beyond the limit to which credit will be given. This mode of speaking is called by the Greek name hyperbole, by the masters not only of Greek, but also of Latin literature. And this mode is found not only here, but in several other parts also of the divine literature: as, “They set their mouths against the heavens;” and, “The top of the hair of such as go on in their trespasses;” and many others of the same kind, which are no more wanting in the sacred Scriptures than other tropes or modes of speaking. Of these I might give a more elaborate discussion, were it not that, as the evangelist here terminates his Gospel, I am also compelled to bring my discourse to a close.
Source: Tractates on the Gospel of John (New Advent)