Can you explain the concept of non-duality as presented in Chapter 52, using the analogies provided?

Chapter 52 powerfully illustrates the concept of non-duality, where the devotee and the Guru merge into one. It uses two key analogies to explain this. First, it compares the devotee to a river and the Guru to the ocean; by embracing the ocean, the river forgets its own identity or "river-ness." The text states that similarly, when a devotee takes refuge, the Guru does not leave any sense of duality in them. The chapter further clarifies this by stating that when two lamps embrace, they become one, the state of duality vanishes, and there is only a single, unified light.