Therefore has he mercy on whom he will have mercy, and whom he will he hardens.
All Commentaries on Romans 9:18 Go To Romans 9
Augustine of Hippo
AD 430
He enables the one on whom he has mercy to do good, and he leaves the one whom he hardens to do evil. But that mercy is the result of the prior merit of faith, and that hardening is the fruit of prior unbelief, so that we do good deeds by the gift of God and evil deeds because of his punishment. Yet in either case free will is not taken away from man, whether it is to believe in God, so that mercy on us might follow, or to disbelieve in him, so that punishment on us might be the result.