Chapter 52 uses several metaphors to describe the union of a devotee with Sai. Can you explain this concept of non-duality using the examples from the text?

Chapter 52 explains that when a devotee takes complete refuge at Sai's feet, the sense of duality or separation vanishes. To illustrate this profound state of oneness, the text employs several powerful metaphors. It compares the devotee to a river that, upon embracing the ocean, forgets its own river-ness and becomes the ocean itself. Similarly, it mentions that just as two lamps become one when they embrace, resulting in a single unified light, the devotee merges with the Guru. Other examples provided in Chapter 52 include salt instantly becoming one with the ocean upon entering it, and the scent being inseparable from camphor, all to show how devotees relinquish their "I-ness" and become equal with Sai.