This he does to take down the objector's unseasonable inquisitiveness, and excessive curiosity, and to put a check upon it, and teach him to know what God is, and what man, and how incomprehensible His foreknowledge is, and how far above our reason, and how obedience to Him in all points is binding. So when he has made this preparatory step in his hearer, and has hushed and softened down his spirit, then with great felicity he introduces the answer, having made what he says easy of admittance with him. And he does not say, it is impossible to answer questions of this kind, but that (5 manuscripts No, but what? That) it is presumptuous to raise them. For our business is to obey what God does, not to be curious even if we do not know the reason of them. Wherefore he said, “Who are you that repliest against God?” You see how very light he makes of him, how he bears down his swelling spirit! “Who are you?” are you a sharer of His power? nay, are you sitting in judgment upon God? Why in comparison with Him you can not have a being even! nor this or that sort of being, but absolutely none! For the expression, “who are you?” does much more set him at naught than “you are nothing.” And he takes other ways of showing further his indignation in the question, and does not say, “Who are you that” answerest “God?” but, “that repliest against,” that is, that gainsayest, and that opposest. For the saying things ought to be so, and ought not to be so, is what a man does that “replies against.” See how he scares them, how he terrifies them, how he makes them tremble rather than be questioning and curious. This is what an excellent teacher does; he does not follow his disciples' fancy everywhere, but leads them to his own mind, and pulls up the thorns, and then puts the seed in, and does not answer at once in all cases to the questions put to him.
<!--<span class="stiki"></span>-->Ver. 20, 2l. “Shall the thing formed say to Him that formed it, Why have You made me thus? Hath not the potter power, of the same lump to make one vessel unto honor, and another unto dishonor?”
Here it is not to do away with free-will that he says this, but to show, up to what point we ought to obey God. For in respect of calling God to account, we ought to be as little disposed to it as the clay is. For we ought to abstain not from gainsaying or questioning only, but even from speaking or thinking of it at all, and to become like that lifeless matter, which follows the potter's hands, and lets itself be drawn about anywhere he may please. And this is the only point he applied the illustration to, not, that is, to any enunciation of the rule of life, but to the complete obedience and silence enforced upon us. And this we ought to observe in all cases, that we are not to take the illustrations quite entire, but after selecting the good of them, and that for which they were introduced, to let the rest alone. As, for instance, when he says, “He couched, he lay down as a lion;” let us take out the indomitable and fearful part, not the brutality, nor any other of the things belonging to a lion. And again, when He says, “I will meet them as a bereaved bear”, let us take the vindictiveness. And when he says, “our God is a consuming fire”, the wasting power exerted in punishing. So also here must we single out the clay, the potter, and the vessels. And when he does go on to say, “Hath not the potter power over the clay, of the same lump to make one vessel unto honor, and another unto dishonor?” do not suppose that this is said by Paul as an account of the creation, nor as implying a necessity over the will, but to illustrate the sovereignty and difference of dispensations; for if we do not take it in this way, various incongruities will follow, for if here he were speaking about the will, and those who are good and those not so, He will be Himself the Maker of these, and man will be free from all responsibility. And at this rate, Paul will also be shown to be at variance with himself, as he always bestows chief honor upon free choice. There is nothing else then which he here wishes to do, save to persuade the hearer to yield entirely to God, and at no time to call Him to account for anything whatever. For as the potter (he says) of the same lump makes what he pleases, and no one forbids it; thus also when God, of the same race of men, punishes some, and honors others, be not thou curious nor meddlesome herein, but worship only, and imitate the clay. And as it follows the hands of the potter, so do thou also the mind of Him that so orders things. For He works nothing at random, or mere hazard, though thou be ignorant of the secret of His Wisdom. Yet you allow the other of the same lump to make various things, and findest no fault: but of Him you demand an account of His punishments and honors, and will not allow Him to know who is worthy and who is not so; but since the same lump is of the same substance, you assert that there are the same dispositions. And, how monstrous this is! And yet not even is it on the potter that the honor and the dishonor of the things made of the lump depends, but upon the use made by those that handle them, so here also it depends on the free choice. Still, as I said before, one must take this illustration to have one bearing only, which is that one should not contravene God, but yield to His incomprehensible Wisdom. For the examples ought to be greater than the subject, and than the things on account of which they are brought forward, so as to draw on the hearer better. Since if they were not greater and did not mount far above it, he could not attack as he ought, and shame the objectors. However, their ill-timed obstinacy he silenced in this way with becoming superiority. And then he introduces his answer. Now what is the answer?
<!--<span class="stiki"></span>-->Ver. 22, 23, 24. “What if God, willing to show His wrath, and to make His power known, endured with much long-suffering the vessels of wrath fitted to destruction: and that He might make known the riches of His glory on the vessels of mercy, which He had afore prepared unto glory, even us, whom He has chosen, not of the Jews only, but also of the Gentiles.”
Source: Homilies on Romans (New Advent)