According to Chapter 33, what is the deeper spiritual significance of Sai Baba giving Udi to his devotees?

Chapter 33 of the Shri Sai Satcharita reveals the profound spiritual significance behind Sai Baba's practice of distributing Udi. The sacred ash serves as a powerful symbol and a constant reminder of the impermanent nature of the physical world. Baba conveyed through this Udi that the entire visible universe is transient and will ultimately become ash. The human body, described as being made of the five elements, is like a piece of wood that exists only to experience its destined enjoyments. Once those are exhausted, it too will become ash. Therefore, the Udi is a sign of the truth that Brahman alone is real while the cosmos is an illusion (Maya).