12 But even now, says the Lord, come back to me with all your heart, keeping from food, with weeping and with sorrow: 13 Let your hearts be broken, and not your clothing, and come back to the Lord your God: for he is full of grace and pity, slow to be angry and great in mercy, ready to be turned from his purpose of punishment. 14 May it not be that he will again let his purpose be changed and let a blessing come after him, even a meal offering and a drink offering for the Lord your God? 15 Let a horn be sounded in Zion, let a time be fixed for going without food, have a holy meeting: 16 Get the people together, make the mass of the people holy, send for the old men, get together the children and babies at the breast: let the newly married man come out of his room and the bride from her tent. 17 Let the priests, the servants of the Lord, be weeping between the covered way and the altar, and let them say, Have mercy on your people, O Lord, do not give up your heritage to shame, so that the nations become their rulers: why let them say among the peoples, Where is their God?
Matthew Henry's Commentary on Joel 2:12-17
Commentary on Joel 2:1-14
(Read Joel 2:1-14)
The priests were to alarm the people with the near approach of the Divine judgments. It is the work of ministers to warn of the fatal consequences of sin, and to reveal the wrath from heaven against the ungodliness and unrighteousness of men. The striking description which follows, shows what would attend the devastations of locusts, but may also describe the effects from the ravaging of the land by the Chaldeans. If the alarm of temporal judgments is given to offending nations, how much more should sinners be warned to seek deliverance from the wrath to come! Our business therefore on earth must especially be, to secure an interest in our Lord Jesus Christ; and we should seek to be weaned from objects which will soon be torn from all who now make idols of them. There must be outward expressions of sorrow and shame, fasting, weeping, and mourning; tears for trouble must be turned into tears for the sin that caused it. But rending the garments would be vain, except their hearts were rent by abasement and self-abhorrence; by sorrow for their sins, and separation from them. There is no question but that if we truly repent of our sins, God will forgive them; but whether he will remove affliction is not promised, yet the probability of it should encourage us to repent.
Commentary on Joel 2:15-27
(Read Joel 2:15-27)
The priests and rulers are to appoint a solemn fast. The sinner's supplication is, Spare us, good Lord. God is ready to succour his people; and he waits to be gracious. They prayed that God would spare them, and he answered them. His promises are real answers to the prayers of faith; with him saying and doing are not two things. Some understand these promises figuratively, as pointing to gospel grace, and as fulfilled in the abundant comforts treasured up for believers in the covenant of grace.