According to Chapter 50, what is the relationship between the Guru's grace, the devotee's ego, and the experience of 'So-ham'?

Chapter 50 describes a profound spiritual transformation initiated by the Guru's grace. The text explains that when the Guru, Sai Baba, places his hand on a devotee's head, their ego is "crushed to pieces." This destruction of the ego is the crucial prerequisite for higher spiritual realization. Immediately following this, the chapter states that the internal chant of "So-ham," meaning "I am He," begins within the devotee, and their perception of the world becomes filled with joy. This sequence, as detailed in Chapter 50, illustrates that the Guru's direct intervention is the catalyst that dissolves the individual self (ego) and awakens the blissful, non-dual experience of oneness with the divine.