Based on the excerpts from Chapter 6, what is the relationship between the Sadguru's grace, the ego, and the realization of non-duality?

Chapter 6 establishes a direct relationship between the Sadguru's grace, the annihilation of the ego, and the ultimate realization of non-duality (Advaita). The text states that the 'wondrous' touch of the Guru’s hand can burn the 'subtle body (ego) into ashes.' This destruction of the ego is presented as a crucial act of grace. The chapter explicitly links this to higher realization by stating that the Guru 'dissolves the sense of 'me and mine' right there, manifesting the harmony of non-duality.' The author reinforces this by noting how Sai Baba personally suppresses his ego during the writing process. Thus, Chapter 6 teaches that the Guru's grace actively dismantles the ego, which is the primary barrier to experiencing the non-dual truth of 'Soham' ('I am He').