{7} And the shapes of the locusts were like unto horses prepared unto battle; and on their heads were as it were crowns like gold, and their faces were as the faces of men.

(7) The form of these hellish spirits and administers, is outlined by signs and visible figures in this manner: that they are very expert and swift: that wherever they are in the world, the kingdom is theirs: that they manage all their affairs with cunning and skill, in this verse: that making show of mildness and tender affection to draw on men with, they most impudently rage in all mischief: that they are most mighty to do hurt Re 9:8 that they are freed from being hurt by any man, as armed with the colour of religion and sacred authority of privilege: that they fill all things with horror, Re 9:9 that they are fraudulent: that they are poisonous and extremely offensive though their power is limited. Re 9:10. All these things are found in the infernal powers and communicated by them to their ministers and vassals.

People's New Testament

9:10 And they had tails like unto scorpions. They stung terribly, and left a string in their path.

Wesley's Notes

9:10 And they have tails like scorpions - That is, each tail is like a scorpion, not like the tail of a scorpion. To hurt the unsealed men five months - Five prophetic months; that is, seventy - nine common years So long did these calamities last.

Jamieson-Fausset-Brown Bible Commentary

10. tails like unto scorpions-like unto the tails of scorpions.

and there were stings-There is no oldest manuscript for this reading. A, B, Aleph, Syriac, and Coptic read, "and (they have) stings: and in their tails (is) their power (literally, 'authority': authorized power) to hurt."

Matthew Henry's Concise Commentary

9:1-12 Upon sounding the fifth trumpet, a star fell from heaven to the earth. Having ceased to be a minister of Christ, he who is represented by this star becomes the minister of the devil; and lets loose the powers of hell against the churches of Christ. On the opening of the bottomless pit, there arose a great smoke. The devil carries on his designs by blinding the eyes of men, by putting out light and knowledge, and promoting ignorance and error. Out of this smoke there came a swarm of locusts, emblems of the devil's agents, who promote superstition, idolatry, error, and cruelty. The trees and the grass, the true believers, whether young or more advanced, should be untouched. But a secret poison and infection in the soul, should rob many others of purity, and afterwards of peace. The locusts had no power to hurt those who had the seal of God. God's all-powerful, distinguishing grace will keep his people from total and final apostacy. The power is limited to a short season; but it would be very sharp. In such events the faithful share the common calamity, but from the pestilence of error they might and would be safe. We collect from Scripture, that such errors were to try and prove the Christians, 1Co 11:19. And early writers plainly refer this to the first great host of corrupters who overspread the Christian church.