Can you explain the role of Sadguru Sai in a devotee's spiritual journey, particularly in overcoming ego and achieving non-duality, as detailed in Chapter 6?

According to Chapter 6, Sadguru Sai plays a pivotal role in a devotee's spiritual advancement by actively helping them overcome obstacles like the ego. The text poetically states that the Guru's touch can burn the subtle body (ego) into ashes. When ego attempts to surface, Sai "suppresses it with His own hand" and empowers the disciple. The chapter further explains that the Sadguru's grace awakens the sense of 'I am He' (Soham), dissolving the sense of 'me and mine' and revealing the harmony of non-duality (Advaita), leading the devotee to innate bliss and spiritual realization.