How does Chapter 10 explain the Sadguru's ability to influence a devotee's fate and karma?

Chapter 10 provides profound insights into the power of a Sadguru like Sai Baba. It states that by placing faith in the Guru's feet, He can metaphorically "strike a nail over the lines of destiny," effectively changing a devotee's fate. The chapter explains that pure service to the Sadguru can completely destroy the cycle of worldly existence (Samsara). Furthermore, as Chapter 10 describes, by the Guru's mere sight, the knots of the heart are broken, attachments vanish, and both accumulated (Sanchit) and current (Kriyaman) karmas are destroyed, leading the devotee to liberation.