In Rev 5, a book (scroll) was revealed to John , which was sealed in a special way with seven seals, and nobody was able to open or read it. Then John heard " Look, the Lion of the tribe of Judah, the heir to David's throne, has conquered. He is worthy to open and break it's seven seals." Next, John heard a song being sung before Christ, "For you were killed, and your blood has ransomed people for God from every tribe and language and people and nation." John heard again a song of worship, " The Lamb is worthy-- the Lamb who was killed. He is worthy ..." and "Blessing and honor and glory and power belong to the one sitting on the throne".
Jesus is on the throne , He is worthy, and He is in control.