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Revelation 9
Study commentary
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Key passages
Historical and literary context
Locust swarms were the ancient world's most feared natural disaster, and John's description draws on the plague of Exodus 10 and on Joel 1 and 2, where locusts are pictured as an invading army with horses' faces and lions' teeth. The Euphrates was Rome's eastern frontier, beyond which lay the Parthians, whose cavalry were the terror of Roman armies; a vast mounted host from the east is what a first-century reader would picture. "Apollyon," the Destroyer, may be a barb at Domitian, who liked to be identified with the god Apollo, whose emblem was the locust. The five months match the natural span of a locust season. The refusal to repent echoes Pharaoh under the plagues.
How the chapter unfolds
Verses 1 to 6, the fifth trumpet: the fallen star, the opened Abyss, the smoke, and the locusts with limited power and a five-month term of torment so severe that people will seek death. Verses 7 to 11 describe the locusts and name their king. Verse 12 marks the passing of the first woe. Verses 13 to 16, the sixth trumpet: the voice from the altar, the four angels at the Euphrates prepared for the exact hour, and the army of two hundred million. Verses 17 to 19 describe the horses of fire, smoke, and sulfur that kill a third of mankind. Verses 20 and 21 record that the survivors did not repent of idolatry, murder, sorcery, immorality, or theft.
Why this chapter matters
Revelation 9 is the book's most vivid picture of evil unleashed and yet limited: the locusts may torment but not kill, for five months, and only those without God's seal; the four angels are released at an appointed hour. Every horror is on a leash. The chapter's real weight falls on its last two verses, where plagues that should drive people to repentance do not. That diagnosis, that judgment by itself does not change hearts, prepares for the different strategy of chapters 10 and 11, where the church's witness, not the trumpets, brings people to give glory to God.
Interpretive tension to watch
Readers differ over whether the locusts and the horsemen are demonic forces, human armies described in visionary language, or both at once, and over whether the trumpets cover the whole age between the two comings or a final period. The "star that had fallen" is Satan to some interpreters and an angel sent by God to others; the text says the key "was given" to it, which keeps God in control either way. The plain sense of the chapter is easier than its symbols: evil is real, permitted, bounded, and does not have the last word.
Questions for this chapter
- The locusts are told what they may and may not do, and for how long. What does that say about the limits of evil?
- Verses 20 and 21 report that the survivors did not repent. Why might suffering harden people rather than turn them?
- How does the seal of God in verse 4 relate to the sealing of chapter 7?
Study with context
Use this as a chapter guide, then press deeper into the text itself. The goal is to slow down observation, notice structure, and ask better questions before jumping to conclusions.
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Revelation 9 is the chapter people have in mind when they call Revelation frightening, and it earns the reputation. The fifth trumpet sounds, a star that has fallen from heaven is handed the key to the Abyss, and when the shaft is opened, smoke pours out like a furnace and blots out the sun. Out of the smoke come locusts, but not locusts: they have the sting of scorpions, the look of horses armored for battle, human faces, women's hair, lions' teeth, iron breastplates, and wings that sound like an army of chariots. Their king is named Destroyer in two languages. Yet the most important words in the description are the limits. They may not touch the grass or the trees. They may not touch anyone who has the seal of God. They may not kill. They have five months. The sixth trumpet is worse, four angels released from the Euphrates at an hour fixed in advance, and behind them a cavalry of two hundred million whose horses breathe fire and sulfur and kill a third of the human race. John is drawing on the locust plague of Egypt, the locust army of Joel, and the Parthian horsemen every Roman feared, and piling the images on top of one another until they cannot be seen, only felt. Then the chapter ends with two quiet verses that are its real subject. The rest of mankind, the ones who survived, did not repent. They went on worshiping idols that cannot see or hear or walk, and went on with murder, sorcery, immorality, and theft. The trumpets have done all that terror can do, and it was not enough.