What is the deeper philosophical meaning behind Sai Baba's practice of distributing Udi, as explained in the Satcharita?

According to Chapter 33, the act of giving Udi, or sacred ash, was imbued with profound philosophical meaning. Baba used it to teach that the entire visible universe is ultimately transient, as insubstantial as ash. The Udi serves as a powerful reminder that our physical bodies, described as being made of five elements, are temporary and will eventually turn to ash once our destined experiences are exhausted. Baba's intention, as described in the text, was for us to maintain this awareness constantly. The Udi symbolizes the ultimate truth that Brahman alone is real while the universe is pervaded by Maya, or illusion, encouraging discrimination and renunciation.