John Calvin on Isiaah 44:9…
Those who make an image, all of them are useless,
And their precious things shall not profit;
They are their own witnesses;
They neither see nor know, that they may be ashamed.
Thus believers alone will render a true testimony to their God, because he knows, directs, and governs all things. The rest must at length be ashamed, though now they defend their errors with mad eagerness; for their conscience is a witness that nothing but opinion and a vain imagination holds their minds captive.