That there is a God, then, is no matter of doubt to those who receive the Holy Scriptures, the Old Testament, I mean, and the New; nor indeed to most of the Greeks. For, as we said, the knowledge of the existence of God is implanted in us by nature. But since the wickedness of the Evil One has prevailed so mightily against man’s nature as even to drive some into denying the existence of God, that most foolish and woe-fulest pit of destruction (whose folly David, revealer of the Divine meaning, exposed when he said, The fool said in his heart, There is no God), so the disciples of the Lord and His Apostles, made wise by the Holy Spirit and working wonders in His power and grace, took them captive in the net of miracles and drew them up out of the depths of ignorance to the light of the knowledge of God. In like manner also their successors in grace and worth, both pastors and teachers, having received the enlightening grace of the Spirit, were wont, alike by the power of miracles and the word of grace, to enlighten those walking in darkness and to bring back the wanderers into the way. — Book I, Chapter III