I have not spoken in secret, in a dark place of the earth: the heathen idols deliver their oracles darkly and doubtfully, in obscure cells and caverns of the earth, or out of the bellies of their priests; but I have delivered my oracles to Israel publicly and plainly, as one that was neither afraid nor ashamed to utter my mind, lest I should be convinced of folly and falsehood; which was the case of idols. Seek ye me in vain; serve and worship me for nought. As I appointed them work, so I promised, and from time to time have given, and shall give, them abundant recompence for their service; whereas the Gentiles seek to their idols in vain, for they can do them no good, as is observed in the next verse. I the Lord speak righteousness, I declare things that are right; I require nothing of my people which is not highly just and good; whereas the idols commanded their worshippers to do many sinful and shameful things, even in their worship, as is notoriously known.
Related Commentaries of Isaiah 45:19
Isaiah 45:19
19 I have not spoken in secret, in a dark place of the earth: I said not unto the seed of Jacob, Seek ye me in vain: I the LORD speak righteousness, I declare things that are right.