Can you explain the concept of non-duality and merging with the Guru as described in Chapter 52 using its analogies?

Chapter 52 explains the profound concept of non-duality through several powerful analogies. It compares a devotee taking refuge at Sai's feet to a river entering the ocean; just as the river forgets its 'river-ness' and becomes the ocean, the devotee loses their sense of 'I-ness' and duality, becoming equal with the Guru. Other metaphors include salt becoming one with the ocean, two lamps embracing to become one light, and the scent being inseparable from camphor. This merging signifies the ultimate goal where the devotee relinquishes their individual identity to achieve unity with Sai.