How does Chapter 33 connect Sai Baba's physical ritual of maintaining the Dhuni fire to the spiritual wisdom he imparted through the Udi?

Chapter 33 masterfully links Sai Baba's daily physical actions with his profound spiritual teachings. The chapter describes the process: Baba would buy firewood, keep the Dhuni constantly burning, and collect the resulting ash. This wasn't just a mundane ritual; it was a living sermon. The Udi produced from the fire became the medium for a deep lesson on Vairagya (detachment). By giving the ash, Baba was demonstrating that the entire material world, which seems so real, is as transient as the wood that turns to ash. He wanted to instill the awareness that our bodies too are temporary, and that we should remember the eternal truth that Brahman alone is real, while the universe is pervaded by Maya. The physical Udi was a tangible symbol of this ultimate spiritual truth.