How does Chapter 52 explain the concept of non-duality and the devotee's union with Sai?

Chapter 52 uses several powerful analogies to explain the principle of non-duality. It states that when a devotee takes refuge at Sai's feet, the sense of duality vanishes, and they become equal with Him by relinquishing their "I-ness." This union is compared to a river entering the ocean and becoming the ocean itself, or salt instantly becoming one with the ocean. Another beautiful example given in Chapter 52 is how two lamps embracing become one unified light, immediately causing the state of duality to disappear. The chapter asks rhetorically if the scent can remain separate from camphor or luster from gold, reinforcing this idea of complete, inseparable union.