Can you explain the connection between Maya, Brahman, and the symbolism of Udi as presented in Chapter 33?

Chapter 33 presents a sophisticated theological argument connecting the physical Udi to the metaphysical concepts of Maya and Brahman. The text explicitly states that the Udi is a sign that the entire visible universe, which is pervaded by Maya (illusion), is ultimately as impermanent as ash. In contrast, the chapter asserts that "Brahman alone is real." Therefore, when Sai Baba distributed the sacred ash, it was a practical teaching designed to foster detachment and spiritual insight. As Chapter 33 explains, he gave the Vibhuti to instill the awareness that our bodies and the world are transient, encouraging devotees to remember the eternal truth of Brahman.