Epistle LXXII: To Jubaianus, Concerning the Baptism of Heretics, §22-23:
23. But some one says, "What, then, shall become of those who in past times, coming from heresy to the Church, were received without baptism?"
St. Cyprian was adamant that
valid baptism was not possible outside the Church.
Further down,
# 24
24. Nor let any one think that, because baptism is proposed to them, heretics will be kept back from coming to the Church, as if offended at the name of a second baptism; nay, but on this very account they are rather driven to the necessity of coming by the testimony of truth shown and proved to them. For if they shall see that it is determined and decreed by our judgment and sentence, that the baptism wherewith they are there baptized is considered just and legitimate, they will think that they are justly and legitimately in possession of the Church also, and the other gifts of the Church; nor will there be any reason for their coming to us, when, as they have baptism, they seem also to have the rest. But further, when they know that there is no baptism without, and that no remission of sins can be given outside the Church, they more eagerly and readily hasten to us, and implore the gifts and benefits of the Church our Mother, assured that they can in no wise attain to the true promise of divine grace unless they first come to the truth of the Church. Nor will heretics refuse to be baptized among us with the lawful and true baptism of the Church, when they shall have learned from us that they also were baptized by Paul, who already had been baptized with the baptism of John, as we read in the Acts of the Apostles.
https://catholicism.org/baptism-of-desire-its-origin-and-abandonment-in-the-thought-of-saint-augustine.htmlFather Francois Laisney, in a letter written to me in 1999 on this issue, labored much to convince me that Saint Cyprian favored baptism of desire. Regarding those converted heretics who were received back into the Church by the western bishops and the head of the Church himself without being rebaptized, he proved his point. But these converts were in a different category than catechumens — after all, they were accepted as members of the Church by the pope, and Cyprian himself, at least in council, was not denying the pope the right to admit these converts without rebaptizing them. Remember, in the previously-cited letter to Jubaianus he was arguing that this decision should be left to each individual bishop. His contention, therefore, if one looks at the logic of the actual argument and not his excessive vitriol, was not that the “deposit of faith” was being compromised by Pope Stephen, but that, for certainty sake, when the validity of heretical baptisms was questionable (as it was in his mind) the matter fell to one of discipline. To quote Saint Cyprian: “God is powerful in His mercy to give forgiveness also to those who were admitted into the Church in simplicity [of heart] and who died in the Church and not to separate them from the gifts of the Church” (Letter to Jubaianus, n. 23, Patrologia Latina 3, 1125). I put the emphasis on “died in the Church” to prove my point. If Saint Cyprian definitely believed that the Faith itself was being compromised, and that to accept the validity of heretical baptisms was itself “heretical,” then he would not have said that the deceased converts, who were not rebaptized, “died in the Church.” If Fathers Rulleau and Laisney wish to believe that Saint Cyprian was transmitting an apostolic tradition concerning baptism of desire, fine; but they certainly should not insist that fellow Catholics are obligated to believe that. They should also take note that Saint Augustine did not cite Cyprian as an authority when he first proposed baptism of desire as his own personal opinion.