How does Chapter 10 explain the Sadguru's ability to alter a devotee's destiny?

According to Chapter 10, the Sadguru possesses the profound ability to change one's fate, a concept described with the metaphor that He "strikes a nail over the lines of destiny." This power is activated when a devotee places pure faith in the Guru's feet. The text explains that through the service of the Sadguru, the entire cycle of worldly existence (Samsara) can be destroyed without the need for complex intellectual or logical struggles. By trusting the Guru as one would a boatman to cross an ocean, devotees can overcome the three types of miseries and find liberation.