Isaiah 45:9

For we, who do not know at all what the future has in store and see merely our present circumstances, misjudge what will profit us. God … sees what is to come as if it were present. These prophecies are addressed, however, to those who …

Just as the potter models anew the vase of broken clay, [God] says, for my part, I will make you better than at first. "Will the plowman plow the earth all day?" This comes back to saying it is not effective to use chastisement continually, …

Likewise, the common Jewish people rejected the grace that was given them and found it unacceptable; for they resisted, as I have said, the teachings of Christ.… "For I desire to refashion you," he says, "into something better, to remake you into something superior through a spiritual birth which, of course, is the one through water and the Spirit; but you foolishly resist my plans. Did the clay," he says, "ever reproach the potter for not having a skillful hand, or for not knowing how to give shape to what he holds in his hands? Nor," he says, "does the one who is about to be born put a question to his own father, 'Will you give birth?' How is it, then, that you, who are like clay in the potter's hands, and do not know at all how your spiritual rebirth will take place, are not afraid of being cantankerous? And why do you not realize you ought to leave it to me, as to a craftsman and father, how to do these things?" … Therefore, it is necessary to [yield] to what God says. He himself knows the way of his own works, and what he fashioned is not subject to prying, and what transcends our understanding should be given the honor of unquestioning faith.One must also understand that the prophet Jeremiah was sent to the house of the potter to see him at work. When the clay collapsed and was reshaped into a different vessel, God said to him: "Can I not do with you as this potter has done, O house of Israel? […]

Though this saying is deep and shrouded in much obscurity, you will nonetheless come to understand how true and useful it is. I think it is necessary first to explain briefly the thrust of the ideas. This way it will become more accessible to my listeners and easier to understand. Therefore, the God of all redeemed Israel from Egypt and rescued them from the errors of polytheism and the deceit of the demons, and brought them through the law of Moses to the dawn of the true knowledge of God. He taught them to worship one God and adore one Lord. Then, by means of types and shadows, he wanted to raise them to those things that are still better and more perfect, namely, the things that are in Christ. The law was a tutor, and it stayed until the time of correction, that is, the time of the coming of our savior Jesus Christ when he set aside the shadow of the commandments of the law and the types found in the text, and introduced the people on earth to the beauty of worship in spirit and truth openly and without disguise.But the Jews were quite vexed by this, and because they were still clinging to the types, they resisted Christ, accusing him of transgressing the Mosaic legislation. … Accordingly, since they deemed as unacceptable the benefit that comes from the preaching of the Gospel, although it would have brought them from the inane shadows to spiritual fruitfulness, it says to them: "Will the plowman plow the earth all day?" "O foolish people," he is saying, "the farmer furrows the soil with the plow, but he does not do so forever, nor does he spend the whole time of farming doing the work of the plow. He furrows the soil not simply for the sake of doing so, but that it may be ready to receive the seed when it is sown in it, and thus be productive. […]

862. Woe to him that gainsays. Here he excludes the contradiction of the unbelievers. And first, under the metaphor of a craftsman who fashions clay; for as clay does not contradict the one who fashions it, so the Jews ought not contradict God, by not …