Can you explain the concept of non-duality between a devotee and Sai as described with analogies in Chapter 52?

Chapter 52 uses several powerful analogies to describe the state of non-duality achieved when a devotee takes refuge at Sai's feet. It teaches that by relinquishing their "I-ness," the devotee becomes equal with Him. This is compared to a river entering the ocean and forgetting its river-ness to become the ocean itself. Other analogies mentioned in Chapter 52 include salt instantly becoming one with the ocean, two lamps embracing to become a single light, and the impossibility of separating scent from camphor or light from the sun. In this state, any sense of duality vanishes.