"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.
And I saw a strong angel proclaiming with
a loud voice, Who is worthy to open the book,
and to loose the seals thereof?"
Revelation 5:1-2

The book, or scroll, in God's right hand speaks
of authority. It is written within and without.

There are seven seals showing completeness.

When it is opened the heavens and the earth
are purified of sin.