Can you describe the main teachings about Udi presented in the first half of Chapter 33?

The first half of Chapter 33 introduces the glory of Udi (sacred ash) as a central theme. It begins by describing Sai Baba's practice of collecting firewood, offering it to his Dhuni, and creating large quantities of ash. This chapter details his daily custom of giving this Udi to devotees at all times of the day and specifically as a sign of permission for those wishing to leave Shirdi. The text then transitions to the deeper meaning, explaining that the Udi signifies the impermanent nature of the visible universe. As taught in this part of the chapter, Baba gave the Udi to remind everyone that our bodies, too, will eventually become ash, encouraging a constant awareness of this transient reality.