How does Chapter 52 explain the concept of non-duality, where a devotee becomes one with the Guru?

Chapter 52 uses several powerful analogies to describe the state of non-duality. It explains that when a devotee takes refuge at Sai's feet, the sense of separation vanishes, much like a river entering the ocean forgets its 'river-ness' and becomes the ocean itself. Another comparison made is to salt instantly becoming one with the ocean upon entering it. The text also mentions that just as two lamps embracing become one unified light, devotees who relinquish their 'I-ness' become equal with Him. This union is so complete that, as Chapter 52 states, the scent cannot remain separate from the camphor, nor the light from the sun.