Revelation of John 14:18

Another angel came out from the altar. The altar of burnt offerings.

Which had the power over fire. This angel, one that has power over fire, comes forth from the altar where fire was kept burning. Fire is an emblem of punishment, of destruction.

Thrust in thy sickle. He bids the angel who holds the sickle to begin his work, to put forth his sickle and cut off the clusters of the vine of the earth for they are ripe. Grapes are chosen as a symbol of the wicked because of their harmony with the figure that describes the fate of the wicked. "The vine of the earth" means the world that lieth in sin, "earth" being used in an unfavorable sense thus far in Revelation.
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