We have stated that this chapter contains seven visions. This chapter is not chronlogical but is another parenthensis, it will save much confusion to recognize this.
Vision two - "And I saw another angel fly in the midst of heaven, having the everlasting gospel to preach unto them that dwell on the earth, and to every nation, and kindred and tongue, and people, Saying with a loud voice, Fear God, and give glory to him; for the hour of his judgment is come: and worship him that made heaven, and earth, and sea, and the fountains of waters." Verses 6-7
During the present age the gospel is committed to men to proclaim, 11 Cor. 5:18. During the first half of the tribulation period the two witnesses are given supernatural power to preach the gospel. Here in Revelation 14:6 during the second half of the tribulation angels add their voices to the proclamation of the gospel. Why angels? angels are indestructable, so no matter how intense the persecution they cannot be silenced.
"In the midst of heaven", that is in the atmospheric heavens. God is never without a witness! This highlights the intensity of Satan's opposition to God ! "Having the everlasting gospel to preach unto them", it is the good news of salvation by faith in Christ. The emphasis will be on the judgment that is impending!
The final judgments of Revelation are about to occur, with this the final call goes out to all men to repent and turn to Christ. This is happening against the backdrop of Satan's rampage as he seems to be triumphing.
Vision three - "And there followed another angel, saying, Babylon is fallen, is fallen, that great city, because she made all nations to drink of the wine of her of the wrath of her fornication." Verse 8. This is the announcement of the fall of religious Babylon, this takes place at the mid-trib point.
Babylon is used three ways in scripture. 1- It refers to the literal city that was on the Euphrates river. 2 - It refers to a religious system such as we see in Revelation 17, the Harlot church. 3 - It refers also the the political system such as found in Revelation18, the kingdom of Antichrist. Babylon was the area where pagan religion began. False religion reaches its apex by the midpoint of the tribulation period. "Babylon is fallen, is fallen", mentioned twice, probably a reference to both religious and political Babylon.
Revelation 17, is a detailed description of the fall of religious Babylon. Revelation 18, is a detailed description of the fall of political Babylon.
Remember this vision is looking forward and is not a part of the chronology of the book.
The reason for the fall of religious Babylon is announced, "Because she made all nations drink of the wrath of her fornication." The great apostate church will lead her people into a union with the the kingdom of Antichrist. Turning away from the Christ she purported to worship and follow. She seduces the world to worship the Antichrist, for that she is punished. This will unfold at the start of the second half of the tribulation period.