16 I will bring the blind by a way that they don’t know.
I will lead them in paths that they don’t know.
I will make darkness light before them,
and crooked places straight.
I will do these things,
and I will not forsake them. 17 “Those who trust in engraved images,
who tell molten images,
‘You are our gods’
will be turned back.
They will be utterly disappointed.

Israel's Failure to Profit from Discipline

18 “Hear, you deaf,
and look, you blind,
that you may see. 19 Who is blind, but my servant?
Or who is as deaf as my messenger whom I send?
Who is as blind as he who is at peace,
and as blind as Yahweh’s servant? 20 You see many things, but don’t observe.
His ears are open, but he doesn’t listen. 21 It pleased Yahweh, for his righteousness’ sake, to magnify the law,
and make it honorable.

Matthew Henry's Commentary on Isaiah 42:16-21

Commentary on Isaiah 42:13-17

(Read Isaiah 42:13-17)

The Lord will appear in his power and glory. He shall cry, in the preaching of his word. He shall cry aloud in the gospel woes, which must be preached with gospel blessings, to awaken a sleeping world. He shall conquer by the power of his Spirit. And those that contradict and blaspheme his gospel, he shall put to silence and shame; and that which hinders its progress shall be taken out of the way. To those who by nature were blind, God will show the way to life and happiness by Jesus Christ. They are weak in knowledge, but He will make darkness light. They are weak in duty, but their way shall be plain. Those whom God brings into the right way, he will guide in it. This passage is a prophecy, and is also applicable to every believer; for the Lord will never leave nor forsake them.

Commentary on Isaiah 42:18-25

(Read Isaiah 42:18-25)

Observe the call given to this people, and the character given of them. Multitudes are ruined for want of observing that which they cannot but see; they perish, not through ignorance, but carelessness. The Lord is well-pleased in the making known his own righteousness. For their sins they were spoiled of all their possessions. This fully came to pass in the destruction of the Jewish nation. There is no resisting, nor escaping God's anger. See the mischief sin makes; it provokes God to anger. And those not humbled by lesser judgments, must expect greater. Alas! how many professed Christians are blind as the benighted heathen! While the Lord is well-pleased in saving sinners through the righteousness of Christ he will also glorify his justice, by punishing all proud despisers. Seeing God has poured out his wrath on his once-favoured people, because of their sins, let us fear, lest a promise being left us of entering into his rest, any of us should be found to come short of it.