What does Chapter 10 say about a Guru's ability to change a devotee's destiny?

Chapter 10 makes the profound claim that a Guru can fundamentally alter a person's fate. This is articulated with the powerful metaphor that by placing faith in the Guru's feet, He "strikes a nail over the lines of destiny." The chapter asserts that while other gods are illusory, the Guru is the "one eternal God." Through devoted service to the Sadguru, the entire worldly existence, or Samsara, can be completely destroyed without the need for intellectual struggles, showing the Guru's power to override predestined circumstances for a faithful bhakta.