God is the Redeemer

Revelation5:1-5
A scroll with writing on both sides and sealed with seven seals. No one was found who was worthy to open the scroll or look inside.
The Lion of the tribe of Judah, the Root of David, has triumphed. He is able to open the scroll and is seven seals.
At this point John begins to see the things which 'must happen' in the future.
A scroll completely covered with writing, inside and out, and sealed with seven seals - the scroll that contains the world's destiny - must be opened. John is full of anguish that no one is found worthy. Then one of the elders calls his attention to 'the Lion from Judah's tribe': the Lion who won his victory as the slain Lamb.
Chapter 4 pictured God the creator. This chapter pictures God the Redeemer.
Why?
God let John know what will happen in the world.
God has the authority of world and heaven.
How?
Be rejoice and faithful, hope to the Lord Almighty.