Rev. Jim Humphries explores the theme of fear in his sermon "Fear Not." Drawing parallels between childhood memories of "The Wizard of Oz" and Isaiah 6, he challenges the perception of God as a terrifying deity. Humphries emphasizes the message of love and reassurance in scripture, advocating against living in fear and promoting a God of forgiveness and mercy. He encourages listeners to embrace their role as partners in spreading God's love and to follow where God leads, rather than succumbing to fear.