A Treatise on the Grace of Christ and on Original Sin - Augustine St.

“After the conviction and condemnation of the Pelagian heresy with its authors by the bishops of the Church of Rome, —first Innocent, and then Zosimus, —with the cooperation of letters of African councils, I wrote two books against them: one On the Grace of Christ, and the other On Original Sin. The work began with the following words: ‘How greatly we rejoice because your bodily, and, above all, because of your Spiritual welfare.’”