How does Chapter 52 illustrate the concept of non-duality and the merging of a devotee with the Guru?

Chapter 52 uses several powerful analogies to explain the state of non-duality achieved by a devotee. It teaches that upon taking refuge at Sai’s feet, the sense of duality vanishes. This merging is compared to a river entering the ocean and becoming the ocean itself, forgetting its former identity as a river. Another metaphor used is of salt instantly becoming one with the ocean upon entering it. The chapter also likens this union to two lamps embracing to become a single, unified light. In this state, devotees relinquish their "I-ness" and become equal with the Guru, just as scent cannot be separated from camphor or light from the sun.