What does Chapter 10 reveal about Sai Baba's power over a person's karma and destiny?

Chapter 10 of the Shri Sai Satcharitra teaches that the Sadguru holds significant power to alter a devotee's spiritual and material path. It explicitly states that by placing faith in His feet, He "strikes a nail over the lines of destiny," which means he can change one's fate. Furthermore, the chapter details the Guru's impact on karma, explaining that by His mere sight, the knots of the heart are broken and a devotee's accumulated (Sanchit) and current (Kriyaman) karmas are destroyed. This act clears the path for spiritual progress and unties the knot of birth and death.