How does Chapter 52 describe the process of a devotee achieving liberation and non-duality through devotion to Sai?

Chapter 52 explains that Sai Baba guided His faithful devotees towards liberation while they were still in their physical bodies. The process begins with devotion to the Guru's 'Saguna' or physical form, as meditating on this form eventually leads to the manifestation of the subtle Self when the attachment to form vanishes. The chapter emphasizes that the formless Self is difficult to grasp directly. The ultimate goal is the dissolution of duality. Chapter 52 uses powerful imagery to describe this state of non-duality: just as a river merges with the ocean and forgets its 'river-ness,' a devotee who takes complete refuge in Sai loses all sense of a separate self. This union is also compared to two lamps embracing to become a single, unified light.