I heard there's a story in Chapter 32 about a woman who wanted to fast. Can you tell me what happened to her and what the lesson was?

Certainly. Chapter 32 recounts the story of a woman whose mind was set on having Sai Baba's darshan and observing a strict fast for three days without any food. However, Baba intervened in her plan. Her firm resolve was broken when Baba arranged for her to not only cook puranpolis but also to eat them to her heart's content. The profound lesson taught through this incident, as explained in Chapter 32, is that true welfare and blessed action lie in wearing out the body for the sake of serving others, rather than just through personal austerities like fasting. Baba made her understand this principle in a way she would never forget.