The whole vision has become to you like the words of a book that is sealed, which men deliver to one who is literate, saying, "Read this, please." And he says, "I cannot, for it is sealed."
Isaiah 29:11
Surrounding context
29:10 For the LORD has poured out on you The spirit of deep sleep, And has closed your eyes, namely, the prophets; And He has covered your heads, namely, the seers.
29:11 The whole vision has become to you like the words of a book that is sealed, which men deliver to one who is literate, saying, "Read this, please." And he says, "I cannot, for it is sealed."
29:12 Then the book is delivered to one who is illiterate, saying, "Read this, please." And he says, "I am not literate."