What are the main teachings and stories presented in Chapter 33 of the Shri Sai Satcharita?

Chapter 33 of the Shri Sai Satcharita is primarily dedicated to explaining the glory and significance of Udi, or sacred ash. It describes Sai Baba's daily ritual of maintaining a sacred fire (Dhuni), into which he would offer logs of wood. The resulting ash was then distributed to devotees. As the chapter narrates, this Udi was given to devotees at all times of the day, and especially when they were taking leave from Shirdi, which was considered his true permission to depart. The chapter also delves into the deep philosophical meaning behind this practice, explaining that the Udi symbolizes the impermanent nature of the physical universe and the body, reminding us that only the ultimate reality, Brahman, is eternal.