"[God] promised not from the power of our will but from His own predestination. For He promised what He Himself would do, not what men would do. Because, although men do those good things which pertain to God’s worship, He Himself makes them to do what He has commanded; it is not they that cause Him to do what He has promised. Otherwise the fulfilment of God’s promises would not be in the power of God, but in that of men."