New Defender's Study Bible Notes
14:14 Son of man. The Lord Jesus has appeared to John in many different aspects of His person and work (Lamb, Rider, Angel), but here He returns to the first (and eternal) aspect, as the Son of man (Revelation 1:13). He is ready to reap the harvest of the earth, separating the few remaining stalks of wheat from the great mass of tares, and this is a judgment committed to the Son of man (Matthew 13:41; John 5:27).
14:15 out of the temple. The temple here is probably the Jerusalem temple. The angel has seen the abomination in the holy place and so pleads with the Son of man to proceed with His reaping. This reaping probably correlates with the ensuing bowl judgments.
14:18 from the altar. This angel apparently calls out from the altar of the earthly temple, urging that the vintage of the earth be trampled in the divine winepress. See also Joel 3:13; Revelation 19:15. This time the sickle of judgment is used not to reap a harvest of grain but rather to gather the vintage of grapes of the earth for the winepress of God.