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

Chapter 52 uses several analogies to illustrate the merging of a devotee with Sai, where duality ceases to exist. It compares this union to a river entering the ocean and becoming the ocean itself, or like salt instantly becoming one with the ocean. Another metaphor used is of two lamps embracing to become a single, unified light. The chapter states that when devotees take refuge at Sai’s feet and relinquish their "I-ness," they become equal with Him, and no sense of duality remains. This process leads faithful devotees to liberation while still in their bodies.