What does Chapter 10 say about the power of a Sadguru and how he can impact a devotee's fate and spiritual journey?

Chapter 10 presents the Sadguru, or Guru, as the supreme spiritual guide and even as the "one eternal God." It states that by placing faith in His feet, a devotee's destiny can be changed, using the metaphor that He "strikes a nail over the lines of destiny." The chapter further explains that the Sadguru acts as a boatman to help devoted bhaktas cross the "ocean of existence" (Bhavasagar) and overcome the three types of miseries. For those with true devotion and faith, the Sadguru can place Knowledge (Samvitti) in their hands and grant them the attainment of liberation (Moksha) effortlessly, destroying their worldly existence (Samsara).