What is the deeper philosophical lesson about Maya and Brahman that Baba taught through the act of giving Udi?

Chapter 33 of the Shri Sai Satcharitra reveals the advanced spiritual teaching embedded in the simple act of giving Udi. The sacred ash was a powerful symbol used to teach the Vedantic principle that Brahman alone is real and the universe is an illusion, or Maya. The chapter explicitly states that Baba's intention was to show that the entire visible cosmos is as transient as ash. By giving the Udi, he was reminding devotees to maintain the awareness that their own bodies are temporary and will eventually become ash. This practice encouraged followers to look beyond the illusory world and focus on the eternal, unchanging reality of Brahman, a core message conveyed through the Vibhuti.