Revelation 5:1 And I saw in the right hand of him that sat on the throne a book written within and on the backside, sealed with seven seals.
2 And I saw a strong angel proclaiming with a loud voice, Who is worthy to open the book, and to loose the seals thereof?
3 And no man in heaven, nor in earth, neither under the earth, was able to open the book, neither to look thereon.
4 And I wept much, because no man was found worthy to open and to read the book, neither to look thereon.
As chapter 5 begins we see there is a scroll that is sealed with seven seals, the completeness of God. It says a strong angel cried out looking for someone to open the book. This lets us know that even a strong angle could not open the seals much less a man. It saddened John that no one was found worthy to open the seals.