On Grace and Free Will

They also maintain that God's grace, which is given through the faith of Jesus Christ, and which is neither the law nor nature, avails only for the remission of sins that have been committed, and not for the shunning of future ones, or the subjugation of those which are now assailing us. Now if all this were true, surely after offering the petition of the Lord's Prayer, “Forgive us our debts, as we forgive our debtors,” we could hardly go on and say, “And lead us not into temptation.” The former petition we present that our sins may be forgiven; the latter, that they may be avoided or subdued—a favour which we should by no means beg of our Father who is in heaven if we were able to accomplish it by the virtue of our human will.

Now I strongly advise and earnestly require your Love to read attentively the book of the blessed Cyprian which he wrote On the Lord's Prayer. As far as the Lord shall assist you, understand it, and commit it to memory. In this work you will see how he so appeals to the free will of those whom he edifies in his treatise, as to show them, that whatever they have to fulfil in the law, they must ask for in the prayer. But this, of course, would be utterly empty if the human will were sufficient for the performance without the help of God.