John receives a vision of heaven and God's throne room. He sees a door standing open in heaven and is called up to witness future events. In heaven, John sees God sitting on a throne surrounded by 24 elders and four living creatures. The living creatures represent aspects of Jesus' identity as lion, calf, man, and eagle. They praise God continually. John then sees a scroll in God's hand sealed with seven seals that only the Lamb, Jesus, is worthy to open through his sacrifice. Many angels, living creatures and elders sing praise to the Lamb for his redemption of mankind.