Can you explain the philosophical concept of non-duality, or Advaita, as it is presented in Chapter 6?

Chapter 6 touches upon the advanced philosophical concept of non-duality (Advaita) by describing how the Sadguru facilitates this realization in a devotee. The text explains that Sai Baba awakens the intrinsic sense of 'I am He' (Soham), which reveals the innate bliss within. In this state, He dissolves the devotee's sense of 'me and mine,' which is the foundation of ego and duality. By dissolving this separateness, He manifests the harmony of non-duality, where the individual soul recognizes its unity with the ultimate reality, a core teaching of Advaita philosophy.