And the entire vision will be to you like the words sealed in a scroll. If it is handed to someone to read, he will say, “I cannot, because it is sealed.”
11. Therefore every vision hath become to you. The Prophet expresses still more clearly what he had formerly said, that the blindness of the Jews will be so great that, though the Lord enlightens them by the clearest light of his word, they will understand nothing.
Here, I. The prophet stands amazed at the stupidity of the greatest part of the Jewish nation. They had Levites, who taught the good knowledge of the Lord and had encouragement from Hezekiah in doing so, Ch2 30:22. They had prophets, who brought them messages immediately from God, and signified to them what were the causes and what would be the effects of God's displeasure against them.
Commenting on Isaiah 29:9-16
And the vision of all is become unto you as the words of a book that is sealed,.... The prophecies of all the prophets contained in the Scriptures; or all the prophecies in the book of Isaiah, concerning the Messiah, were no more seen, known, and understood, both by the priests and the people, than if they had been in a book, written, rolled up, and sealed.