Revelation Chapter 9
IN THIS LESSON
Now the killing begins. The sixth angel unleashes four angels bound by the river Euphrates, and they wipe out a third of the human race with 200 million horsemen. Their appearance and activity resemble modern-day tanks, with fire, smoke, and sulfur coming out of their mouths. Yet, people do not repent. Why is that?
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N.T. Wright, Revelation For Everyone (Louisville, KY: Westminster John Knox, 2011), 88-92.