De Servo Arbitrio

Their miracles, Spirit, and sanctity, therefore, belong to us who preach Jesus Christ, and not the ability and works of men. And now, what wonder if those who were thus holy, spiritual, and wonderful for miracles, were sometimes under the influence of the flesh, and spoke and wrought according to the flesh; since that happened, not once only, to the very apostles under Christ Himself. For you do not deny, but assert, that "Free-will" does not belong to the Spirit, or to Christ, but is human; so that, the Spirit who is promised to glorify Christ, cannot preach "Free will." If, therefore, the fathers have at any time preached "Free-will," they have certainly spoken from the flesh, (seeing they were men,) not from the Spirit of God; much less did they work miracles for its confirmation.