Cross reference
Revelation 5:4
4 And I wept much, because no one was found worthy to open the book, or to look in it.
Daniel 12:8-9
8 I heard, but I didn't understand: then said I, my lord, what shall be the issue of these things?
9 He said, Go your way, Daniel; for the words are shut up and sealed until the time of the end.
Revelation 4:1
1 After these things I looked and saw a door opened in heaven, and the first voice that I heard, like a trumpet speaking with me, was one saying, "Come up here, and I will show you the things which must happen after this."