John Cassian

These two then, namely, the grace of God and free will, seem opposed to each other but really are in harmony. And we gather from the system of goodness that we ought to have both alike, lest if we withdraw one of them from man, we may seem to have broken the rule of the church's faith. For when God sees us inclined to will what is good, he meets, guides and strengthens us. For "at the voice of your cry, as soon as he shall hear, he will answer you"; and "Call upon me," he said, "in the day of tribulation, and I will deliver you, and you shall glorify me." And again, if he finds that we are unwilling or have grown cold, he stirs our hearts with salutary exhortations, by which a good will is either renewed or formed in us.