What does Chapter 10 say about the role of a Sadguru and the benefits of serving one?

According to Chapter 10, the Sadguru is the one eternal God, distinct from all other illusory gods. By placing faith in the Guru's feet, a devotee's fate can be changed, an act described as striking 'a nail over the lines of destiny.' The chapter explains that pure service to the Sadguru completely destroys the cycle of worldly existence (Samsara) without needing intellectual struggles. The Sadguru acts as a boatman, guiding devotees across the ocean of existence and helping them overcome physical, mental, and divine miseries. In response to devotion, the Guru grants knowledge and effortless liberation, breaks the knots of the heart, and destroys accumulated and current karmas.