The prophet sounds the alarm of a dreadful calamity, the description of which is most terribly worked up, Joe 2:1-11. Exhortation to repentance, fasting, and prayer, that the Divine judgments may be averted, Joe 2:12-17. God will in due time take vengeance on all the enemies of pure and undefiled religion, Joe 2:18-20. Great prosperity of the Jews subsequent to their return from the Babylonish captivity, Joe 2:21-27. Joel then makes an elegant transition to the outpouring of the Holy Ghost on the day of Pentecost, Joe 2:28-30; for so these verses are explained by one of the twelve apostles of the Lamb. See Act 2:16-21. Prophecy concerning the destruction of Jerusalem, which was shortly to follow the opening of the Gospel dispensation, Act 2:31. Promises of safety to the faithful and penitent; promises afterwards remarkably fulfilled to the Christians in their escape to Pella from the desolating sword of the Roman army, Act 2:32.