According to Chapter 33, what profound truth did Sai Baba want to convey by giving Udi to his devotees?

By distributing Udi, or sacred ash, Sai Baba intended to convey a deep philosophical truth about the nature of reality. Chapter 33 explains that the Udi is a powerful symbol reminding us that the entire visible universe is ultimately as transient as ash. Baba taught that our bodies, made of five elements, are temporary vessels for experiencing destiny, and once that is exhausted, they too will become ash. The Udi serves as a constant reminder of this impermanence, encouraging us to remember that Brahman alone is the ultimate reality while the cosmos is pervaded by Maya, or illusion.