The text mentions that 'This worldly life is like Udi.' Can you explain what this metaphor means?

This metaphor, found in Chapter 33, serves as a powerful teaching on the nature of existence. It signifies that worldly life, like our physical bodies, is transient and will ultimately return to a basic state, just as wood burns down to ash (Udi). The text elaborates by comparing the body to "water on a lotus leaf," emphasizing its perishable nature and urging the "renunciation of pride in it." Furthermore, Udi is described as being nothing but earth, the ultimate destination for all name and form. Therefore, the metaphor teaches devotees to remember the temporary nature of their lives and the world, and to contemplate the underlying truth rather than getting lost in transient forms.