15 and another messenger did come forth out of the sanctuary crying in a great voice to him who is sitting upon the cloud, 'Send forth thy sickle and reap, because come to thee hath the hour of reaping, because ripe hath been the harvest of the earth;' 16 and he who is sitting upon the cloud did put forth his sickle upon the earth, and the earth was reaped.

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.