From which source did Baba's Udi originate, and what lesson does it teach about the physical body?

The Udi that Sai Baba distributed originated from the sacred fire, or Dhuni, which burned constantly, day and night, in the Masjid. As described in Chapter 33, Baba would take handfuls of ash directly from this Dhuni to give as a benediction to his followers. This Udi carries a significant lesson about the physical body and the material world. It serves as a reminder that 'this worldly life is like Udi' and that our 'perishable body will fall' like water off a lotus leaf. Therefore, the gift of Udi teaches the importance of renouncing pride in our transient physical form and remembering our ultimate destination.