Based on Chapter 33, analyze the connection between the impermanence of the physical body and the ultimate reality of Brahman as symbolized by Sai Baba's Udi.

Chapter 33 provides a profound analysis of the symbolism of Udi, linking the impermanence of the physical world to the eternal nature of Brahman. The text explicitly states that Baba's intention in giving Udi was to remind us that the entire visible universe is as transient as ash. This teaching is directly applied to our own bodies, which the chapter describes as being like 'wood made of five elements,' destined to become ash once their karmic enjoyments are exhausted. This reminder of mortality is meant to foster constant awareness. This awareness, as Chapter 33 explains, points to a deeper truth: 'Brahman alone is real, the cosmos is infinite.' The Udi, therefore, serves as a tangible symbol of this non-dualistic philosophy, signifying that the perceived universe is pervaded by Maya (illusion) and that one should strive to remember the ultimate reality of Brahman.