Revelation 18:21

Angel - Messenger.

Cast - Worn-out; old; cast-off.

Sea - Large basin.

Thus with violence shall that great city Babylon be thrown down - This action is finely and forcibly expressed by the original words: Οὑτως ὁρμηματι βληθησεται Βαβυλων ἡ μεγαλη πολις. The millstone will in falling have not only an accelerated force from the law of gravitation, but that force will be greatly increased by the projectile force impressed upon it by the power of the destroying angel.

Shall be found no more at all - In her government, consequence, or influence. This is true of ancient Babylon; we are not certain even of the place where it stood. It is also true of Jerusalem; her government, consequence, and influence are gone. It is not true of Rome pagan; nor, as yet, of Rome papal: the latter still exists, and the former is most intimately blended with it; for in her religions service Rome papal has retained her language, and many of her heathen temples has she dedicated to saints real or reputed, and incorporated many of her superstitions and absurdities in a professedly Christian service. It is true also that many idols are now restored under the names of Christian saints!

And a mighty angel - See the notes on Revelation 18:1. This seems, however, to have been a different angel from the one mentioned in Revelation 18:1, though, like that, he is described as having great power.

Took up a stone like a great millstone - On the structure of mills among the ancients see the notes on Matthew 24:41.

And cast it into the sea - As an emblem of the utter ruin of the city; an indication that the city would be as completely destroyed as that stone was covered by the waters.

Saying, Thus with violence - With force, as the stone was thrown into the sea. The idea is, that it would not be by a gentle and natural decline, but by the application of foreign power. This accords with all the representations in this book, that violence will be employed to overthrow the papal power. See Revelation 17:16-17. The origin of this image is probably Jeremiah 51:63-64; "And it shall be, when thou hast made an end of reading this book, that thou shalt bind a stone to it, and cast it into the midst of Euphrates; and thou shalt say, Thus shall Babylon sink, and shall not rise from the evil that I will bring on her."

18:21 And a mighty angel took up a stone, and threw it into the sea - By a like emblem Jeremiah fore - showed the fall of the Chaldean Babylon, Jeremiah 51:63 ,64.