The Westminster Confession speaks of the Spirit’s renewing the will and determining it to what is good by his almighty power. This refers to the omnipotence of God. Far from a mere enticement, God’s effectual call on the human soul derives from the power source of omnipotence. The same power that called the world into existence out of nothing is now exercised in our redemption. As God calls the world into being out of nothing, so he calls us to saving faith out of “nothing,” calling us who have no spiritual virtue whatever.
Sproul, R.C.; Grace Unknown: The Heart of Reformed Theology; Baker Books; Grand Rapids, MI; copyright 1997; p. 191