What is the deeper philosophical meaning of Udi, particularly in relation to discrimination and renunciation?

According to Chapter 33, the philosophical meaning of Udi is profound, representing the core concepts of discrimination and renunciation. The text explains that the pairing of discrimination (viveka) and renunciation (vairagya) is symbolized by the combination of Vibhuti (Udi) and Dakshina. This combination is described as essential for successfully crossing the metaphorical "river of worldly existence." The Udi serves as a constant reminder that the body is perishable and that we should renounce pride in it. By contemplating the Udi, one is encouraged to understand the falsity of the world and realize the ultimate truth, as Udi itself is just earth, the final destination of all name and form.