[383] Ps. xl. 5. [384] Rom. viii. 28. [385] 2 Tim. ii. 19. [386] See Gal. vi. 1. [387] Ps. cxix. 28. [388] See Phil. iii. 15. [389] Pet. iii. 20, 21. [390] Cypr. _Ep._ lxxiii. sec. 20. BOOK SIXTH. IN WHICH IS CONSIDERED THE COUNCIL OF CARTHAGE, HELD UNDER THE AUTHORITY AND PRESIDENCY OF CYPRIAN, TO DETERMINE THE QUESTION OF THE BAPTISM OF HERETICS. CHAP. I.--1. It might perhaps have been sufficient, that after the reasons have been so often repeated, and considered, and discussed with such variety of treatment, supplemented, too, with the addition of proofs from holy Scripture, and the concurrent testimony of so many passages from Cyprian himself, even those who are slow of heart should thus understand, as I believe they do, that the baptism of Christ cannot be rendered void by any perversity on the part of man, whether in administering or receiving it. And when we find that in those times, when the point in question was decided in a manner contrary to ancient custom, after discussions carried on without violation of Christian charity and unity, it appeared to certain eminent men even amongst the servants of Christ, among whom the blessed Cyprian was specially conspicuous, that the baptism of Christ could not exist among heretics or schismatics, this simply arose from their not distinguishing the sacrament from the effect or use of the sacrament; and because its effect and use was not found among heretics in freeing them from their sins and setting their hearts right, the sacrament itself was also thought to be wanting among them. But if we turn our eyes to the multitude of chaff within the Church, since these also who are perverse and lead an abandoned life in unity itself appear to have no power either of giving or retaining remission of sins, seeing that it is not to the wicked but the good sons that it was said, "Whose soever sins ye remit, they are remitted unto them; and whose soever sins ye retain, they are retained,"[391] yet that such persons both have, and give, and receive the sacrament of baptism, was sufficiently manifest to the pastors of the Catholic Church dispersed over the whole world, through whom the original custom was afterwards confirmed by the authority of a general Council; so that even the sheep which was straying outside, and had received the mark of the Lord from false plunderers outside, if it seek the salvation of Christian unity, is purified from error, is freed from captivity, is healed of its wound, and yet the mark of the Lord is recognised rather than rejected in it; since the mark itself is often impressed both by wolves and on wolves, who seem indeed to be within the fold, but yet are proved by the fruits of their conduct, in which they persevere even to the end, not to belong to that sheep which is one in many; because, according to the foreknowledge of God, as many sheep wander outside, so many wolves lurk treacherously within,