Isaiah 29:10-12, 18

The LORD has made you go into a deep sleep. He has closed your eyes. (The prophets are your eyes.) He has covered your heads. (The seers are your heads.) This vision is like the words of a book that is closed and sealed. You may give the book to someone who can read and tell that person to read it. But he will say, “I can’t read the book, because it is sealed.” Or you may give the book to someone who cannot read and tell him to read it. But he will say, “I don’t know how to read.”

At that time the deaf will hear the words in a book. Instead of having darkness and gloom, the blind will see.