The Joel speaking in the book of Joel is not Samuel’s son who is mentioned in 1 Samuel 8:1-3. The Joel here lived about the same time as Elijah and Elisha. In chapters 2 and 3, he is preaching in Jerusalem about the Day of the Lord. There is very little ever mentioned about him, but we are given a few directions on how to have our lives align with God’s plan for us in Joel 2:12-13. In summary, we need to be sincere.