The Apostle later expresses this directly, saying in verse 22 that the Hebrews, by their quality, deserved only to be utterly destroyed, like defiled vessels.
Yet God spared them according to His mercy and in view of the higher purposes of the divine economy. In that economy the Gentiles were to receive a joyful share.
They proved to be vessels just as fit for the higher purpose as those Jews who were directly prepared for the great honor of being chosen believers in Christ.
The Apostle’s basic thought here is the same as in the earlier examples, especially in the last one. Everything is under the authority of God.
No one can resist this authority, nor even object to it. The creature must submit in silence and reverence to its Creator and Provider.
According to Chrysostom, the Apostle seeks here no other goal than to persuade the hearer to submit to God in all things, and to demand no account from Him in anything.
“As the potter makes what he wishes from the same lump, and no one contradicts him, so do not question or inquire of God why He punishes some and rewards others.
This is true even though they are people of one and the same nation. Instead, reverence Him and imitate the clay.
As it is submissive to the potter’s hands, so you should submit to the decree of the Ruler of the universe. He does not act without purpose, nor at random, though you do not comprehend the mysteries of wisdom.
Yet it does not depend on the potter alone that from the same lump one thing comes out for honorable use and another for low use. Rather, it depends on the use made by those who use the object.
So here also the matter depends on free choice. As Pharaoh became a vessel of wrath by his own lawlessness, so those who were saved became vessels of mercy by their piety.
If the greater part belongs to God, we nevertheless contribute something small from ourselves. Although one must both will and struggle, one must not rely on one’s own struggles.
Rather, one must rely on God’s love for mankind. As the Apostle also said about himself elsewhere: ‘not I, but the grace which was with me’; 1 Cor 15:10.
Why, then, do some become vessels of wrath and others vessels of mercy? By their own free choice.
Yet God, according to His immeasurable goodness, shows mercy to both. He had mercy not only on those being saved, but also on Pharaoh, as much as possible.
Both those being saved and Pharaoh enjoyed the same longsuffering. If Pharaoh was not saved, this was entirely by his own will.”