Chapter 37.
88 Wherefore do not seek to raise confusion out of the baptism of John, the source and intention of which was either such as I have here set forth; or if any other better explanation of it can be given, this much still is clear, that the baptism of John and the baptism of Christ are two distinct and separate things, and that the former was expressly called the baptism of John, as is clear both from the answer of those men whose case you quoted, and from the words of our Lord Himself, when he says, "The baptism of John, whence was it? From heaven, or of men?" But the latter is never called the baptism of Cæcilianus, or of Donatus, or of Augustine, or of Petilianus, but the baptism of Christ. For if you think that we are shameless, because we will not allow that any one should be baptized after baptism from us, although we see that men were baptized again who had received the baptism of John, who certainly is incomparably greater than ourselves, will you maintain that John and Optatus were of equal dignity? The thing appears ridiculous. And yet I fancy that you do not hold them to be equals, but consider Optatus the greater of the two. For the apostle baptized after baptism by John: you venture to baptize no one after baptism by Optatus. Was it because Optatus was in unity with you? I know not with what heart a theory like this can be maintained, if the friend of the Count, who had in the Count a god for his companion, is said to have been in unity, and the friend of the Bridegroom to have been excluded from it. But if John was preeminently in unity, and far more excellent and greater than all of us and all of you, and yet the Apostle Paul baptized after him, why do you then not baptize after Optatus? Unless indeed it be that your blindness brings you into such a strait that you should say that Optatus had the power of giving the Holy Spirit, and that John had not! And if you do not say this, for fear of being ridiculed for your madness even by the insane themselves, what answer will you be able to make when you are asked why men should have required to be baptized after receiving baptism from John, while no one needs to be baptized after receiving it from Optatus, unless it be that the former were baptized with the baptism of John, while, whenever any one is baptized with the baptism of Christ, whether he be baptized by Paul or by Optatus, there is no difference in the nature of his baptism, though there is so great a difference between Paul and Optatus? Return then, O you transgressors, to a right mind, and do not seek to weigh the sacraments of God by considerations of the characters and deeds of men. For the sacraments are holy through Him to whom they belong; but when taken in hand worthily, they bring reward, when unworthily, judgment. And although the men are not one who take in hand the sacrament of God worthily or unworthily, yet that which is taken in hand, whether worthily or unworthily, is the same; so that it does not become better or worse in itself, but only turns to the life or death of those who handle it in either case. And in respect of what you said, that "in those whom Paul baptized after they had received the baptism of John, he washed off what had already existed," you certainly would not have said it had you taken a moment to consider what you were saying. For if the baptism of John required washing off, it must, beyond all doubt, have had some foulness in it. Why then should I press you further? Recollect or read, and see whence John received it, so shall you see against whom you have uttered that blasphemy; and when you have discovered this, your heart will surely be beaten, if a rein be not set on your tongue.
89. To come next to what you think you say against us with so much point: "If we do ill in urging this, why do you seek after us?" cannot you even yet call to mind that only those are sought after who have perished? Or is the incapacity for seeing this an element in your ruin? For the sheep might say to the shepherd with equal absurdity, If I do wrong in straying from the flock, why do you search after me? Not understanding that the very reason why it is being sought is because it thinks there is no need for seeking it. But who is there that seeks for you, either through His Scriptures, or by catholic and conciliatory voices, or by the scourgings of temporal afflictions, save only Him who dispenses that mercy to you in all things? We therefore seek you that we may find you; for we love you that you should have life, with the same intensity with which we hate your error, that it might be destroyed which seeks to ruin you, so long as it is not itself involved in your destruction. And would to God that we might seek you in such a manner as even to find, and be able to say with rejoicing of each one of you, "He was dead, and is alive again; he was lost, and is found!"
Source: Answer to Letters of Petilian, Bishop of Cirta (New Advent)