Meanwhile, according to the course of events, Esau should have received the promise of inheritance. Isaac had already resolved to do this, and had sent him to catch game and prepare food, so that, after eating, he might bless him. Had this happened, the word of the Lord, that "the elder shall serve the younger," would not have been justified. For in Esau's blessing it would have stood: "Be master over your brother" (Gen 27:29).
But the word of God can never prove false. God enlightened Rebecca to arrange matters so that Jacob would receive the blessing of the firstborn, and that the words prepared for Esau would be assigned to him. Therefore no one can change what God, according to His foreknowledge, has judged. This is so even if someone deliberately struggles to go against it. In this example, it was not deliberate opposition, but the ordinary course of human affairs.
Here was Isaac, who willed, and Esau, who ran. Yet the matter was arranged, not according to the will of him who willed, nor according to the labor of him who ran, but according to the mercy of God Who has mercy. Recalling this circumstance, the Apostle said: "not of him who wills, nor of him who runs, but of God Who has mercy." No one will tear mercy away from the one whom God has judged worthy of mercy. Yet mercy is not assigned without discernment, but to the worthy.
We cite this circumstance in interpreting these words in order to show where the terms "him who wills" and "him who runs" came from, since this is tangibly evident in that event. Yet after this one may also understand the connection of the discourse in the following way. It was said above that God has mercy on the one on whom mercy should be shown. According to God's righteousness, mercy should be shown to the one who is worthy.
From this someone might conclude that everything here depends on good decisions of the will, that is, on "him who wills," and on the corresponding labors in fulfilling those decisions, that is, on "him who runs." The Apostle forestalls this: no, it is not from this. Will, yes, will; run, yes, run. Without this one cannot act. Yet the final decision of the matter still belongs to the mercy of God, or to grace, which strengthens the will and grants the power to fulfill it.
The one who, with all his desire and labors, entrusts his lot to the mercy of God proves worthy of mercy before God. This mercy crowns him. It may also seem that, according to the Apostle's thought, everything depends on the mercy and goodness of God Who has mercy, while man's own participation makes no difference whether it exists or not. But it only seems so.
The Apostle did not say, "not from willing, nor from running," but "not of him who wills, nor of him who runs." By this he shows that willing and running are not excluded. He only teaches that the one who wills and runs should not base his hope on this alone, still less present any rights on account of it.
Blessed Theophylact writes: "Here the Apostle seems to abolish free will, but in reality he does not. We say of a house that it is the work of the builder. Although the builder needs material and helpers for the construction, nevertheless, since it depends on him, we say that he built the whole house. So also we say of God that everything is His work, although God has need of our free choice. He accomplishes, He gives the crowns, and He condemns. Therefore we say that everything is the work of God."
We read the same in Oecumenius: "One must will and run, and employ all one's strength in the work. But at the same time one must remember that, without the will of God, neither he who wills nor he who runs reaches the goal, unless divine help comes. God has mercy on, and wills, the one who himself wills to be saved."
However these words are understood, they must have acted powerfully on the Jews, terrifying the unbelieving and filling the believing with joy. The latter is obvious in itself, but the Apostle had in view not them, but the former. Here he proves that if there are now unbelievers, this does not mean that the promise has failed. It means that they have proved unworthy of it, like Esau.
Objectors might say: the Jews will and run, they read the Law, perform all the services, and offer sacrifices. Why then are they excluded from the inheritance of the promise? The Apostle speaks as though saying: by appearance the inheritance also belonged to Esau. But because his soul was of another disposition, he did not receive it. So too these Jews, by appearance, ought to be heirs of the promise. But since their soul is not such as is required of its heirs, that is, since it is unbelieving, the promise is not given to them.
If the unbelieving had felt the force of such a conclusion, they should have received a strong impulse to examine more strictly what was taking place. They should have understood what God, ready to have mercy on them, desired from them. Yet an even stronger impulse should have been given to them by the conclusion drawn from the circumstance mentioned next.
The Lord says: "The Kingdom of God suffers violence, and the violent take it by force" (Mt 11:12). But in the Apostle Paul we find that the work of salvation does not depend on us at all, and that God determined one lot or another before our birth (Rom 9:11, 16, 18). What relation does God's appointment have to our free will?
Answer. That the Kingdom of God suffers violence presupposes one's own efforts. When the Apostle Paul says, "this is not from us," it means that our own efforts do not give what is sought. Both must be joined: to strive, and to expect everything from grace. Our own efforts do not bring us to the goal, because without grace they do not go far. Nor does grace give what is hoped for without efforts, because grace acts in us and for us through our efforts. Both move man forward and bring him to the goal.
Predestination is incomprehensible. It is enough for us to believe with all our heart that it is never contrary to God's grace and righteousness, and that it does not violate human freedom. It is usually resolved thus: God foresees how man will act freely, and determines accordingly. Thus God's decree rests on man's life, and not life on the decree.