The Predestination of the Saints/Gift of Perseverance

But if, perchance, they say that sins are re-remitted to penitents, and that those who die in infancy are not baptized because they are foreknown as not such as would repent if they should live, while God has foreknown that those who are baptized and die in infancy would have repented if they had lived, let them observe and see that if it be so it is not in this case original sins which are punished in infants that die without baptism, but what would have been the sins of each one had he lived; and also in baptized infants, that it is not original sins that are washed away, but their own future sins if they should live, since they could not sin except in more mature age; but that some were foreseen as such as would repent, and others as such as would not repent, therefore some were baptized, and others departed from this life without baptism.

If the Pelagians should dare to say this, by their denial of original sin they would thus be relieved of the necessity of seeking, on behalf of infants outside of the kingdom of God, for some place of I know not what happiness of their own; especially since they are convinced that they cannot have eternal life because they have not eaten the flesh nor drank the blood of Christ; and because in them who have no sin at all, baptism, which is given for the remission of sins, is falsified.

For they would go on to say that there is no original sin, but that those who as infants are released are either baptized or not baptized according to their future merits if they should live, and that according to their future merits they either receive or do not receive the body and blood of Christ, without which they absolutely cannot have life; and are baptized for the true remission of sins although they derived no sins from Adam, because the sins are remitted unto them concerning which God foreknew that they would repent.

Thus with the greatest ease they would plead and would win their cause, in which they deny that there is any original sin, and contend that the grace of God is only given according to our merits. But that the future merits of men, which merits will never come into existence are beyond all doubt no merits at all, it is certainly most easy to see: for this reason even the Pelagians were not able to say this; and much rather these ought not to say it. For it cannot be said with what pain I find that they who with us on catholic authority condemn the error of those heretics, have not seen this, which the Pelagians themselves have seen to be most false and absurd.