That being puffed up with an opinion of their own wisdom, despise the counsels and instructions of God by his prophets, and prefer their own vain fancies before the judgment of the all-wise God, as appears by the error before mentioned, Isaiah 5:20, that they affirmed that to be evil which God had declared to be good.
Related Commentaries of Isaiah 5:21
Isaiah 5:21
21 Woe unto them that are wise in their own eyes, and prudent in their own sight!