Chapter 43 [XXVII.]—Why the Children of the Baptized Should Be Baptized.
If any man, however, is still perplexed by the question why the children of baptized persons are baptized, let him briefly consider this: Inasmuch as the generation of sinful flesh through the one man, Adam, draws into condemnation all who are born of such generation, so the generation of the Spirit of grace through the one man Jesus Christ, draws to the justification of eternal life all who, because predestinated, partake of this regeneration. But the sacrament of baptism is undoubtedly the sacrament of regenation: Wherefore, as the man who has never lived cannot die, and he who has never died cannot rise again, so he who has never been born cannot be born again. From which the conclusion arises, that no one who has not been born could possibly have been born again in his father. Born again, however, a man must be, after he has been born; because, “Except a man be born again, he cannot see the kingdom of God” 614 Even an infant, therefore, must be imbued with the sacrament of regeneration, lest without it his would be an unhappy exit out of this life; and this baptism is not administered except for the remission of sins. And so much does Christ show us in this very passage; for when asked, How could such things be? He reminded His questioner of what Moses did when he lifted up the serpent. Inasmuch, then, as infants are by the sacrament of baptism conformed to the death of Christ, it must be admitted that they are also freed from the serpents poisonous bite, unless we wilfully wander from the rule of the Christian faith. This bite, however, they did not receive in their own actual life, but in him on whom the wound was primarily inflicted.
John iii. 3.