The beginning of the chapter mentions 'non-duality' and 'duality'. What role does Sai play in this philosophical concept?

In its introductory passages, Chapter 12 presents Sai Baba as a Sadguru who directly addresses the philosophical challenge of duality. He is described as the "embodiment of Truth, Consciousness, and Bliss" who stills the turbulent waves of worldly existence. The text explicitly states that through the knowledge of non-duality, Sai Baba removes the "obsession with duality even from the dull-witted." This highlights his role as a spiritual master whose grace and teachings help individuals transcend the perception of separation and realize the underlying unity of all things, a core aspect of non-dual philosophy mentioned in Chapter 12.