Seeing a "door standing open in heaven," John is told to "come up here" . He receives a new view of God's majesty and power (throne) so that he can understand the events on earth that relate to the seven-seal vision.
The voice that invites John to heaven is the voice of Christ. The same voice John heard before spoke to him like a trumpet blast. The voice said, “Come up here, and I will show you what must happen after this.” - This event represents the time after the Churches or in other words after the Rapture.
