Joel calls for Judah to repent and return to God to avoid the oncoming judgement of locusts and captivity.
This book shows God's faithfulness to His people regardless of whether they live with or without Him.
Joel prophesies the outpouring of the Holy Spirit as well as the coming day of the LORD when those who have chosen to live life with God will be restored and eternally blessed, but those who reject God bring endless disaster upon themselves.