How does Chapter 6 explain the concept of non-duality (Advaita) and the devotee's realization of "Soham" (I am He) through the Sadguru's grace?

Chapter 6 delves into the advanced spiritual concept of non-duality (Advaita) as realized through the Sadguru's grace. The text explains that Sai Baba's presence and blessings do more than just purify; they awaken the profound sense of 'I am He' (Soham) within the devotee. This awakening leads to the experience of "innate bliss" and directly "dissolves the sense of 'me and mine' right there." By doing so, the Sadguru manifests the "harmony of non-duality." This chapter further illustrates this by stating that when a devotee reads scriptures, Sai Baba Himself appears as Rama or Krishna, making the devotee hear His own life story, thus blurring the lines between the devotee, the Guru, and the Divine.