Based on Chapter 10, what is the Guru's role in dealing with a person's karma and destiny?

Chapter 10 presents the Sadguru as having supreme authority over a devotee's karma and destiny. It makes the bold claim that by having faith in the Guru, He "strikes a nail over the lines of destiny," which directly implies He can change a person's fated path. The chapter also addresses karma directly, stating that the Guru's powerful sight is enough to destroy a devotee's accumulated (Sanchit) and current (Kriyaman) karmas. This act of grace removes the karmic burdens that bind an individual to the cycle of birth and death, allowing the Guru to guide them across the "ocean of existence" toward liberation.