What is the connection between Sai Baba's daily ritual of maintaining the Dhuni and the spiritual lessons he imparted through the resulting Udi, as explained in Chapter 33?

Chapter 33 of the Shri Sai Satcharita beautifully illustrates the connection between Sai Baba's physical actions and his spiritual teachings. Baba's daily routine involved collecting firewood and maintaining a perpetually burning sacred fire, the Dhuni. From this fire, he would collect the ash, or Udi. As the chapter explains, this wasn't a meaningless ritual. The Udi he distributed carried a profound message, serving as a constant reminder of the impermanence of the material world and the human body, which will ultimately turn to ash. This practice was a direct teaching, urging devotees to understand that the cosmos is pervaded by Maya (illusion) while only Brahman is the ultimate reality. Thus, the daily act of burning wood and giving Udi was a practical, continuous sermon on core spiritual principles.