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

Chapter 10 explains that a Sadguru holds profound power to alter a devotee's life. It states that by placing faith in the Guru's feet, He "strikes a nail over the lines of destiny," which is a powerful metaphor for changing one's fate. The text further elaborates that for a devoted bhakta, the Sadguru becomes a boatman who helps them cross the worldly ocean of existence (Bhavasagar). Through pure service to the Sadguru, the entire worldly existence (Samsara) can be destroyed, and liberation is given effortlessly, showcasing the Guru's immense power to reshape a follower's spiritual and material journey.