How does Chapter 33 connect Sai Baba's physical act of maintaining the Dhuni with the abstract spiritual concepts of Maya and Brahman?

Chapter 33 provides a direct link between Sai Baba's tangible actions and his highest spiritual teachings. The physical process involved Baba buying firewood, offering it to the Dhuni, and creating ash. The chapter then explains that this Udi is the key to understanding a profound truth. The ash symbolizes the transient nature of the entire material world, which is governed by Maya, or illusion. By giving the Udi, Baba was providing a constant, physical reminder that everything we see, including our own bodies, is temporary and will ultimately turn to ash. This realization is meant to guide the seeker towards understanding what is eternal and real, which the chapter identifies as Brahman. The text summarizes this by stating, 'Brahman alone is real, the cosmos is infinite; this Udi is the sign of this truth.'