The commission to evangelize--10:11.
1. Thou must prophesy again: Here is the clear indication that John survived the Patmos revelation. He survived the castastrophe of Jerusalem, to go among the nations, peoples, tongues, kings, proclaiming the passing away of the old things of Judaism and the end of the old system, preaching again the word that concerns the people of all nations. He would himself fulfill Matthew 24:31.
2. Before peoples, nations, tongues and kings: To apply the expression prophesy again to the further things in the Revelation does not fit the language used by the angel, before many peoples, and nations, and tongues, and kings.” The statement is comparable to the words of Jesus to Saul on the Damascus road in that commission to be executed by Paul, the apostle, recorded in Acts 9:15 : “ But the Lord said unto him, Go thy way: for he is a chosen vessel unto me, to bear my name before the Gentiles, and kings, and the children of Israel.”
Furthermore, to make prophesy again mean to continue what he was then doing, and in the same way, would be a disregard for proper use and meaning of words. The passage indicates that John left the scene of these visions and became an active evangelist in many countries, among many peoples and tongues.