How does Chapter 52 explain the concept of a devotee merging with the Guru and overcoming duality?

Chapter 52 uses several powerful analogies to illustrate the merging of a devotee with the Guru, which eliminates duality. It compares this union to a river entering the ocean and losing its separate identity as a river, or salt dissolving and becoming one with the ocean. Another metaphor provided is that of two lamps embracing to become a single, unified light, at which point the state of duality vanishes. The chapter explains that just as scent cannot be separated from camphor, a devotee who takes refuge at Sai's feet relinquishes their sense of "I-ness" and becomes equal with Him, achieving a state of non-duality.