Augustine of Hippo, On the Proceedings of Pelagius Chapter 38: The Same Continued

Bishop John narrated all this in the hearing of Pelagius; but he, of course, might respectfully say: “Your holiness is in error; you do not accurately remember the facts. It was not in reference to the passages of Scripture which you have quoted that I uttered the words: ‘This is what I also believe.’ Because this is not my opinion of them. I do not understand them to say, that God’s grace so co-operates with man, that his abstinence from sin is due, not to ‘him that willeth, nor to him that runneth, but to God that showeth mercy.’”