What does Chapter 10 reveal about the significance of a Sadguru and the benefits of serving one?

According to Chapter 10, the Sadguru is presented as the one eternal God, distinct from other illusory deities. Placing faith in the Guru's feet is said to be powerful enough to change one's destiny, or as the text poetically states, "strikes a nail over the lines of destiny." Serving the Sadguru with purity is described as a way to completely destroy the worldly existence (Samsara) and overcome physical, mental, and divine miseries. The Guru acts as a boatman, guiding devotees across the ocean of existence and effortlessly granting them liberation and knowledge.