4 “I write unto you, little children, because your sins are forgiven you through His name.” Therefore, “little children,” because in forgiveness of sins you have your birth. But through whose name are sins forgiven? Through Augustine's? No, therefore neither through the name of Donatus. Be it your concern to see who is Augustine, or who Donatus: no, not through the name of Paul, not through the name of Peter. For to them that divided unto themselves the Church, and out of unity essayed to make parties, the mother charity in the apostle travailing in birth with her little ones, exposes her own bowels, with words does as it were rend her breasts, bewails her children whom she sees borne out dead, recalls unto the one Name them that would needs make them many names, repels them from the love of her that Christ may be loved, and says, “Was Paul crucified for you? Or were you baptized in the name of Paul?” What says he? “I would not that you be mine, that so you may be with me: be with me; all we are His who died for us, who was crucified for us”: whence here also it is said, “Your sins are forgiven you through His name,” not through the name of any man.
Source: Homilies on the First Epistle of John (New Advent)