Can you explain the concept of non-duality and becoming one with the Guru as described with analogies in Chapter 52?

Chapter 52 uses several powerful analogies to explain the state of non-duality achieved by a devotee. It teaches that when a devotee takes refuge at Sai's feet, the sense of duality vanishes. This is compared to a river entering the ocean and forgetting its river-ness, becoming the ocean itself. Other analogies include two lamps embracing to become one single light, salt instantly becoming one with the ocean it enters, and the scent being inseparable from camphor. In this way, by relinquishing their "I-ness," the devotees become equal with Sai, and no duality remains.