Cross reference
Revelation 5:4
4 And I was very sad, because there was no one able to get the book open or to see what was in it.
Daniel 12:8-9
8 And the words came to my ears, but the sense of them was not clear to me: then I said, O my lord, what is the sense of these things?
9 And he said, Go on your way, Daniel: for the words are secret and shut up till the time of the end;
Revelation 4:1
1 After these things I saw a door open in heaven, and the first voice came to my ears, like the sound of a horn, saying, Come up here, and I will make clear to you the things which are to come.