Can you explain the concept of non-duality (Advaita) and the dissolution of ego as described in Chapter 6 of the Satcharitra?

Chapter 6 of the Sai Satcharitra delves into the advanced spiritual experience of non-duality, or Advaita, facilitated by the Sadguru's grace. The text describes how the Guru's presence and touch can lead to a profound inner transformation. Specifically, it mentions that the Sadguru awakens the sense of 'I am He' (Soham), which is the realization of the unity between the individual soul and the universal consciousness. This awakening simultaneously 'dissolves the sense of 'me and mine' right there,' which is the core of the ego. This powerful imagery in Chapter 6, where the Guru's hand burns the 'subtle body (ego) into ashes', signifies the complete destruction of the illusion of a separate self, leading to the harmonious state of non-duality.