What is the philosophical meaning behind the Udi that Sai Baba distributed, as detailed in Chapter 33 of the Sai Satcharitra?

According to Chapter 33 of the Sai Satcharitra, the Udi, or sacred ash, carries a profound philosophical message. Sai Baba used it to teach about the impermanence of the material world. The text explains that the Udi signifies that the entire visible universe is transient and ultimately like ash. It serves as a reminder that the human body, made of five elements, is like a piece of wood that will also turn to ash once its destined experiences are complete. By giving Udi, Baba encouraged the awareness that Brahman alone is the ultimate reality, while the cosmos is an illusion (Maya), fostering a sense of detachment from worldly things.