What different names are used for the sacred ash in the text, and what is its origin and symbolic nature?

The sacred offering from Sai Baba is referred to by three interchangeable terms: Ash, Vibhuti, and Udi. According to Chapter 33, these three words all have one meaning. This Udi originated from the Dhuni, the sacred fire that burned perpetually in the Masjid, producing what the text calls 'countless bags of Udi.' Symbolically, Udi is equated with earth, representing the ultimate destination of name and form. It serves as a lesson that the world is a 'modification of speech' and that truth can be realized through contemplating this humble clay or ash.