15 Then another angel came from the Temple and shouted to the one sitting on the cloud, "Swing the sickle, for the time of harvest has come; the crop on earth is ripe." 16 So the one sitting on the cloud swung his sickle over the earth, and the whole earth was harvested.

Matthew Henry's Commentary on Revelation 14:15-16

Commentary on Revelation 14:14-20

(Read Revelation 14:14-20)

Warnings and judgments not having produced reformation, the sins of the nations are filled up, and they become ripe for judgments, represented by a harvest, an emblem which is used to signify the gathering of the righteous, when ripe for heaven, by the mercy of God. The harvest time is when the corn is ripe; when the believers are ripe for heaven, then the wheat of the earth shall be gathered into Christ's garner. And by a vintage. The enemies of Christ and his church are not destroyed, till by their sin they are ripe for ruin, and then he will spare them no longer. The wine-press is the wrath of God, some terrible calamity, probably the sword, shedding the blood of the wicked. The patience of God towards sinners, is the greatest miracle in the world; but, though lasting, it will not be everlasting; and ripeness in sin is a sure proof of judgment at hand.