The wrath of God will be complete when God defeats Satan and the antichrist. Some scholars think John wanted to encourage Christians by promising them that God would defeat Satan. Although Satan defeated Christians for a period of time, they will ultimately defeat him.
God rules from a throne. Near to this throne is something that looks like a lot of water made of glass. This is what John was writing about. Some scholars think it had fire coming out of it because God was about to judge someone. Because of this, scholars think John wrote about something that happened in heaven.
John talked about certain people who were praising God. Scholars think John was speaking about Christians who were killed because they believed in Jesus.
See: Exodus 15
### What is the temple having the tent of witness?
John wrote about a temple in heaven. Scholars think the temple God told Moses to build in the Old Testament was based on the temple that is in heaven.
The seven bowls John wrote about are symbols. John wrote about God judging someone or something. Perhaps John wrote about God judging the beast (see: Revelation 11:7)