9:21 The potter: This similitude is used only to shew that we are not to dispute with our Maker, nor to reason with him why he does not give as much grace to one as to another; for since the whole lump of our clay is vitiated by sin, it is owing to his goodness and mercy, that he makes out of it so many vessels of honor; and it is no more than just, that others, in punishment of their unrepented sins, should be given up to be vessels of dishonor.