Ezechiel 11:20

7. But, seeing there are found in the sacred Scriptures themselves certain expressions occurring in such a connection, that the opposite of this may appear capable of being understood from them, let us bring them forth before us, and, discussing them according to the rule of piety, let us furnish an explanation of them, in order that from those few passages which we now expound, the solution of those others which resemble them, and by which any power over the will seems to be excluded, may become clear. Those expressions, accordingly, make an impression on very many, which are used by God in speaking of Pharaoh, as when He frequently says, “I will harden Pharaoh’s heart.” For if he is hardened by God, and commits sin in consequence of being so hardened, the cause of his sin is not himself. …

15. Let us now look at those passages of Ezekiel where he says, “I will take away from them their stony heart, and I will put in them a heart of flesh, that they may walk in My statutes, and keep Mine ordinances. For if God, when He pleases, takes away a heart of stone and bestows a heart of flesh, that His ordinances may be observed and His commandments may be obeyed, it will then appear that it is not in our power to put away wickedness. For the taking away of a stony heart seems to be nothing else than the removal of the wickedness by which one is hardened, from whomsoever God pleases to remove it. Nor is the bestowal of a heart of flesh, that the precepts of God may be observed and His commandments obeyed, any other thing than a man becoming obedient, and no longer resisting the truth, but performing works of virtue. …

7. But, since certain declarations of the Old Testament and of the New lead to the opposite conclusion, namely, that it does not depend on ourselves to keep the commandments and to be saved, or to transgress them and to be lost, let us adduce them one by one, and see the explanations of them, in order that from those which we adduce, any one selecting in a similar way all the passages that seem to nullify free-will, may consider what is said about them by way of explanation. And now, the statements regarding Pharaoh have troubled many, respecting whom God declared several times, “I will harden Pharaoh’s heart.” For if he is hardened by God, and commits sin in consequence of being hardened, he is not the cause of sin to himself; and if so, then neither does Pharaoh possess free-will. …

15. Let us look also at the declaration in Ezekiel, which says, “I shall take away their stony hearts, and will put in them hearts of flesh, that they may walk in My statutes and keep My precepts.” For if God, when He wills, takes away the stony hearts, and implants hearts of flesh, so that His precepts are obeyed and His commandments are observed, it is not in our power to put away wickedness. For the taking away of the stony hearts is nothing else than the taking away of the wickedness, according to which one is hardened, from him from whom God wills to take it; and the implanting of a heart of flesh, so that a man may walk in the precepts of God and keep His commandments, what else is it than to become somewhat yielding and unresistent to the truth, and to be capable of practising virtues? And if God promises to do this, and if, before He takes away the stony hearts, we do not lay the …

Now if faith is simply of free will, and is not given by God, why do we pray for those who will not believe, that they may believe? This it would be absolutely useless to do, unless we believe, with perfect propriety, that Almighty God is able to turn to belief wills that are perverse and opposed to faith. Man’s free will is addressed when it is said, “Today, if ye will hear His voice, harden not your hearts.” But if God were not able to remove from the human heart even its obstinacy and hardness, He would not say, through the prophet, “I will take from them their heart of stone, and will give them a heart of flesh.” That all this was foretold in reference to the New Testament is shown clearly enough by the apostle when he says, “Ye are our epistle, . . . …

And lastly the prophet Jeremiah, speaking in the person of God, clearly testifies that even the fear of God, by which we can hold fast to Him, is shed upon us by the Lord: saying as follows: “And I will give them one heart, and one way, that they may fear Me all days: and that it may be well with them and with their children after them. And I will make an everlasting covenant with them and will not cease to do them good: and I will give My fear in their hearts that they may not revolt from Me.” Ezekiel also says: “And I will give them one heart, and will put a new spirit in their bowels: and I will take away the stony heart out of their flesh and will give them a heart of flesh: that they may walk in My commandments, and keep My judgments and do them: and that they may be My people, and I may be their God.”