God proclaims through the prophet Joel that He is bringing a plague against Judah because of its sin, but if the people will repent, God may relent. When the Messiah arrives there will be signs in the heavens including the moon turning red like blood, and the sun becoming dark. The Apostle Peter cites the prophet Joel as proof that Jesus is the Messiah because many of the signs were fulfilled at Jesus' crucifixion and the subsequent day of Pentecost. Joel also warns that a future judgment is coming on all the nations because they have divided the land of Israel.
CHAPTER 1