Can you summarize the transformative effect of the Guru's grace on a disciple, as detailed in Chapter 50?

Chapter 50 provides a vivid description of the Guru's transformative power. The most direct illustration is the effect of Sai's hand being placed on a devotee's head, which is said to crush their ego to pieces. This act of grace initiates a profound inner change, causing the internal chant of 'So-ham' (I am He) to begin. This realization leads the disciple to perceive everything in the world as being filled with joy. As Chapter 50 explains, the Sadguru is the one who can end the cycle of birth and death, giving a spiritual rebirth to the disciple by granting full initiation ('Anugraha'). This process purifies the heart and leads to the supreme attainment of steady devotion, which is valued even more than formal liberation.