The book of Joel describes the Day of the Lord through locust swarms, battles, and powerful imagery so that readers can understand its magnitude.

There is no particular mention of Israel's sins in the book, but the consequences of the terrible events described are certainly clear. God will one day wipe out all evil and start creation over. But through this destruction also comes eternal protection for those who believe in him. Salvation from the messianic King is once again prophesied, but this time, the Holy Spirit is prophesied to come too, causing seemingly ordinary people to have visions, divine dreams, and be filled with God's Spirit. That's exactly what happened to Jesus' disciples during Pentecost after his death and resurrection, ensuring us that the Day of the Lord is even closer at hand today.