Based on Chapter 33, what was the source of the Udi that Sai Baba distributed, and what is its symbolic representation of the human body?

Chapter 33 explicitly states the source and symbolism of Sai Baba's Udi. The chapter describes how Baba would pile up heaps of dry firewood logs, which he would then offer into the sacred Dhuni, the constantly burning fire he maintained. The Udi was the great quantity of ash that remained from these burnt logs. The text then clarifies the symbolism, explaining that the Udi is a reminder of impermanence. It draws a direct parallel, stating that the human body is also like wood, made of five elements, and that once its destined worldly experiences are exhausted, it too will become motionless and turn into ash. This teaching, conveyed through the Udi, encourages constant awareness of life's transient nature.