“What is the meaning of the sealed book?”
I always guessed that it may be the “Book of Life”, containing the names of all those saved by God’s grace. That may amount to about the same meaning as your interpretation though.
I Believe it includes that but it has to do with the consummation of God’s plan for the universe, something that could only be undertaken by a human being ,worthy enough to ‘enact’ it.As I corinthians 15 tells us,”Since by man came death, by man also comes the resurrection from the dead”. But who among all of humanity is worthy to take the book and to open the seals thereof?