Darrell invites us to think about and celebrate a mystery which takes place every time we worship. When we worship here on earth, we are joining a worship service that is already in progress in heaven. By looking at the passages of Isa. 6, and Rev. 4&5, we see the heavenly worship has changed before and after the death and resurrection of Jesus. The changing dynamic of the heavenly worship shapes and empowers our earthly worship. On earth as it is in heaven. Today, when we gather together to worship, we are to cry out: worthy is the Lamb, who sits in the middle of the One who sits on the throne.