Augustine of Hippo, On the Grace of Christ, and on Original Sin I.30: What Pelagius Thinks is Needful for Ease of Performance is Really Necessary for the Performance

Chapter 30 [XXIX.]—What Pelagius Thinks is Needful for Ease of Performance is Really Necessary for the Performance.

In like manner, in another passage of the same book, he says: “In order that men may more easily accomplish by grace that which they are commanded to do by free will.” Now, expunge the phrase “more easily,” and you leave not only a full, but also a sound sense, if it be regarded as meaning simply this: “That men may accomplish through grace what they are commanded to do by free will.” The addition of the words “more easily,” however, tacitly suggests the possibility of accomplishing good works even without the grace of God. But such a meaning is disallowed by Him who says, “Without me ye can do nothing.”