What is the core message about impermanence that Sai Baba conveyed through the Udi, as detailed in Chapter 33?

The core message about impermanence conveyed through the Udi, as detailed in Chapter 33, is that all material existence, including our own bodies, is temporary. Baba used the Udi to teach a profound lesson in detachment. The chapter explains Baba's intention: to show that the "visible universe is nothing but ash." The human body is compared to wood made of five elements, which exists only to experience its destined karma and, once that is exhausted, will become ash. By giving the Udi, Baba encouraged devotees to constantly remember this truth. The text quotes the implied message from Baba: "Such is the state of yours and mine; may you maintain this remembrance."