How does Chapter 52 use metaphors to explain the concept of non-duality between a devotee and Sai?

Chapter 52 provides several powerful metaphors to illustrate the merging of a devotee with the Guru, where duality vanishes. It compares this union to a river entering the ocean and forgetting its river-ness, becoming the ocean itself. Other analogies mentioned in Chapter 52 include two lamps embracing to become one light, salt dissolving into the ocean to become one with it, and the inability of scent to separate from camphor. Ultimately, by taking refuge at Sai's feet, devotees relinquish their "I-ness" and become equal with Him.