A Treatise on the Merits and Forgiveness of Sins and on the Baptism of Infants

A Necessity arose which compelled me to write against the new heresy of Pelagius. Our previous opposition to it was confined to sermons and conversations, as occasions suggested, and according to our respective abilities and duties; but it had not yet assumed the shape of a controversy in writing. Certain questions were then submitted to me [by our brethren] at Carthage, to which I was to send them back answers in writing; I accordingly wrote first of all three books, under the title “On the Merits and Forgiveness of Sins,” in which I mainly discussed the baptism of infants because of original sin, and the grace of God by which we are justified, that is, made righteous; but [I remarked] no man in this life can so keep the commandments which prescribe holiness of life, as to be beyond the necessity of using this prayer for his sins: “Forgive us our trespasses.” It is in direct opposition to these principles that they have devised their new heresy.