Old Testament

Joel

Joel is a short prophecy that reads a devastating locust plague as a warning of the Day of the LORD and calls all Judah to return to God with fasting and weeping. When the people repent, the LORD promises to restore what the locusts ate, to pour out His Spirit on all people, and to judge the nations and dwell in Zion forever. It belongs in the Bible because its promise of the Spirit, quoted by Peter at Pentecost, marks the beginning of the last days, and its call to 'rend your hearts and not your garments' () defines true repentance.

Author: Joel son of Pethuel (1:1). Nothing else is known about him; he names no king and gives no home town.
Audience: The people of Judah and Jerusalem, led by elders and priests, with the temple standing and its daily offerings in danger of stopping (1:9, 13).
When: Debated, because Joel names no king. Some place him early, in the ninth century BC when the boy-king Joash was guided by the priest Jehoiada; many place him after the exile, around 500-400 BC, when elders and priests led the community; others suggest the late seventh century.
Where: Jerusalem and the surrounding farmland of Judah, with the temple at the center of the book's call to gather.
Genre: Joel is prophetic poetry built around a single crisis. It moves from lament over a present disaster (chapter 1), to an alarm and call to repentance (2:1-17), to the LORD's answer of restoration and the Spirit (2:18-32), to the final judgment of the nations (chapter 3). Its images are vivid and sometimes blur the line between locusts and an army. Joel borrows and shares phrases with other prophets, especially Amos, Obadiah, Isaiah and Micah, so reading him alongside them helps. Read the book as a movement from a local catastrophe to God's final purposes.

Shape of the book

The Locust Plague and a Call to Lament · ch 1Wave after wave of locusts and a drought strip the land; Joel summons drunkards, farmers, priests and elders to mourn and gather at the temple, because the Day of the LORD is near.
The Day of the LORD, Repentance and the Spirit · ch 2An unstoppable army led by the LORD approaches; 'yet even now' He calls for heart-level return, then pities His people, restores the harvests and promises His Spirit on all people.
Judgment on the Nations, the LORD in Zion · ch 3The nations are gathered to the Valley of Jehoshaphat for judgment, multitudes stand in the valley of decision, and the book ends with a fruitful land and the LORD dwelling in Zion.

Themes

The Day of the LORD. It is Joel's central theme. The day is near in the locusts (), terrible in the army led by the LORD (), and final in the judgment of the nations (). It is darkness for the unrepentant and rescue for those who call on the LORD.
Repentance from the Heart. The LORD calls His people to return with fasting, weeping and mourning, but to rend their hearts and not their garments (). Joel grounds the call in God's character from and adds an honest 'Who knows?' (): repentance hopes in mercy without presuming on it.
Restoration of What Was Lost. The LORD answers with grain, new wine and oil, rain in its season, and a promise to repay the years the locusts ate (). The repeated assurance that His people will never again be put to shame () shows restoration as His work.
The Spirit on All People. After the restoration comes a wider gift: God's Spirit poured out on sons and daughters, old and young, even servants (). What had been given to a few leaders and prophets is promised to the whole community.
Justice for the Nations, the LORD in Zion. The nations are judged for scattering God's people, dividing His land and selling His children (). The punishment fits the crime, and the book ends with the reason for every promise: the LORD dwells in Zion (, 21).

Where Christ is

Joel's clearest link to Christ is the promise of the Spirit, which Peter declares fulfilled at Pentecost through the risen and exalted Jesus. Paul applies Joel's 'everyone who calls on the name of the LORD will be saved' to calling on Jesus as Lord. Revelation draws on Joel's harvest and winepress and its spring from the LORD's house for the final judgment and the new creation.

The Spirit Poured Out at Pentecost. Fulfillment. Peter says, 'This is what was spoken by the prophet Joel,' quotes , and explains that the exalted Jesus received the promised Spirit from the Father and poured Him out. The last days have begun with Christ. (; ; ; )
Calling on the Name of the Lord. Fulfillment. Paul quotes in directly after urging readers to confess that Jesus is Lord, so the LORD on whom Joel's hearers called is identified with Jesus. Paul adds that there is no difference between Jew and Greek. (; )
The Harvest and the Winepress. Echo. Joel's 'Swing the sickle, for the harvest is ripe' and the overflowing winepress () stand behind Revelation's picture of one like a son of man reaping the earth and the winepress of God's wrath, placing the final judgment in Christ's hands. (; )
The Spring from the LORD's House. Echo. Joel ends with a fountain flowing from the LORD's house (), like . Revelation shows the river of the water of life flowing from the throne of God and of the Lamb. (; ; )

Voices

C. F. Keil (Keil and Delitzsch). He argued for an early date, placing Joel in the reign of Joash of Judah in the ninth century BC, during the years when the priest Jehoiada guided the young king. Read the full commentary ↗

Reading well, key terms and common misreadings

Read it well

Read 2:12-17 as the turning point. Everything before it builds toward judgment; everything after it is the LORD's answer to a repentant people.
Watch how the locusts of chapter 1 become an army in chapter 2. Readers debate whether 2:1-11 describes the same locusts in military terms, a human invasion, or the locusts as a preview of a greater day.
Read Acts 2 alongside Joel 2:28-32 to see how Peter understood the outpouring of the Spirit and the last days.
Compare Joel's shared lines: 2:13 with Exodus 34:6 and Jonah 4:2; 3:10 with Isaiah 2:4 and Micah 4:3; 3:16 with Amos 1:2; 2:32 with Obadiah 17.
Expect different numbering: Hebrew Bibles number 2:28-32 as chapter 3 and chapter 3 as chapter 4.

Key terms

Day of the LORD יוֹם יְהוָה (yom YHWH) — The time when God steps in decisively to judge and to save. Joel applies it to a present disaster and to the final judgment (1:15; 2:1, 11, 31; 3:14).
Locust אַרְבֶּה (arbeh) — One of four words for locusts in 1:4 and 2:25, perhaps stages of growth or kinds of locust, or a poetic way to describe successive waves.
Return שׁוּב (shuv) — The prophets' word for repentance. Joel's call 'Return to Me with all your heart' (2:12) is matched by the hope that the LORD Himself may turn and relent (2:14).
Spirit רוּחַ (ruach) — God's own life and power. Joel promises it poured out on all people, not only on prophets and leaders (2:28-29).

Easy to misread

Treating the book's date as the key to its meaning. Scholars disagree on whether Joel is early, late pre-exilic or post-exilic, but its message about the Day of the LORD, repentance and the Spirit stands on any of these dates.
Decoding the locusts as modern weapons such as helicopters. The first hearers saw a real plague described in vivid poetry, and the book interprets it as a warning from the LORD.
Taking 'beat your plowshares into swords' (3:10) as approval of war. It is an ironic summons to the nations to come to a battle in which the LORD judges them, the reverse of the peace promised in Isaiah 2:4 and Micah 4:3.
Limiting the gift of the Spirit to an elite. Joel names sons and daughters, old and young, and male and female servants, and Peter applies the promise to all whom the Lord calls (Acts 2:39).

Further reading: David Guzik, Enduring Word · Matthew Henry on CCEL · BibleProject overview video