Chapter 52 uses several analogies to explain the relationship between a devotee and Sai. Can you explain these metaphors and what they teach about non-duality?

Chapter 52 uses several powerful metaphors to describe the merging of a devotee with the Guru, illustrating the principle of non-duality. It compares the process to a river entering the ocean, where the river forgets its "river-ness" and becomes the ocean itself. Another analogy is of two lamps embracing to become one, where the state of duality vanishes, leaving only a single light. The chapter also mentions how salt entering the ocean becomes one with it instantly. Through these examples, Chapter 52 teaches that when a devotee takes refuge at Sai's feet, they relinquish their "I-ness" or individual identity, and no sense of duality remains; they become equal with Him.