What is the deep philosophical significance of Sai Baba giving Udi to his devotees, according to the teachings in Chapter 33?

Chapter 33 of the Sai Satcharitra delves into the profound spiritual meaning behind Sai Baba's practice of giving Udi. The Udi serves as a powerful symbol to remind us that the entire visible universe is transient and ultimately nothing but ash. It teaches that the human body, composed of the five elements, is like a piece of wood destined to burn out once its karmic enjoyments are exhausted, eventually becoming ash. As the chapter states, Baba gives this Vibhuti so that we may constantly remember this impermanence. Furthermore, the Udi is a sign of the ultimate truth that only Brahman is real, while the rest of the cosmos is pervaded by Maya, or illusion.