"When I Don't Desire God: How to Fight For Joy" is a profound exploration of the struggles individuals face when experiencing a lack of desire for God. The author, John Piper, emphasizes that feelings of spiritual dryness are common, yet they should not lead to despair. Instead, he encourages readers to fight against these feelings by seeking joy in God through intentional actions and reflections. Piper believes that genuine joy stems from a deep connection to God, contrasting the fleeting pleasures of the world.