How does Chapter 52 explain the concept of non-duality between a devotee and the Guru?

Chapter 52 uses several powerful analogies to describe the state of non-duality. It states that when a devotee takes refuge at Sai's feet, no sense of separateness remains, similar to how a river enters the ocean and becomes the ocean itself. The chapter further illustrates this by comparing it to two lamps embracing to become one light, or salt instantly becoming one with the ocean. This process involves the devotee relinquishing their 'I-ness' to become equal with the Guru, where no duality can exist, just as scent cannot be separated from camphor.