Old Testament prophecy may seem difficult and obscure at times, but it always helps when these passages are interpreted for us by writers of the New Testament. A clear example is found in Joel 2, for the apostle Peter quoted from the last part of this chapter and applied it to events that took place on the Day of Pentecost in Acts 2. Joel is writing at a time when Israel was facing a plague unlike any they had previously known. An advancing horde of locusts will quickly turn their beautiful landscape into a desolate wilderness. Like an organized army, the insects execute their destruction under the command of the LORD (v 1-11). But this judgment is a warning of worse things to come. Joel wants to sound an alarm so that people will get ready for a coming invasion that will be even more terrifying. Again there is reference to “the day of the LORD” (v 1, 11; also 1:15). This phrase points to a future period of catastrophic judgment, a day in which God will intervene in history to bring final judgment upon all nations. Any disaster of this life will seem small in comparison. “For the day of the LORD is great and very awesome; who can endure it?” (v 11). Only those who have fled to the security God has provided will be safe on the day of His wrath. The New Testament reveals how the cross of Christ is our only refuge, and those who embrace it must do so with true repentance. Joel cautions us not to depend on formal and outward expressions of piety. It’s easy to tear one’s garment as an expression of mourning over sin. But are our hearts truly broken over the ways we have offended God? Are we deeply shamed by our behavior? Has sin become repugnant to us? Return to the LORD “with all your heart… for He is gracious and merciful.” We never know what kinds of undeserved blessings He may pour out in response (v 12-14). From oldest to youngest, all of Israel is called to assemble in humble prayer (v 15-17), trusting that God will restore both the material (v 21-27) and spiritual (v 28-32) prosperity of the nation. Instead of mourning and fear, the land will be filled with joy and gladness, for a remarkable reversal is coming. Twice God declares, “I will pour out My Spirit” before the coming of the great day of judgment. Without distinctions of gender, age, or social status, all of God’s people will receive this marvelous gift of the Holy Spirit. Joel’s prophecy, partially fulfilled at Pentecost, awaits complete fulfillment at Christ’s second coming, which will be accompanied by remarkable celestial wonders (v 28-32). For further meditation: