Based on Chapter 10, what is the role of a Sadguru and what benefits can a devotee expect from placing their trust in one?

Chapter 10 presents the Sadguru as a supreme and essential figure for spiritual liberation. It states that the Guru is the "one eternal God" who can even change a person's destiny, poetically described as striking "a nail over the lines of destiny." The chapter further explains that the Sadguru acts as a boatman to help devoted followers cross the "ocean of existence." By having pure devotion and faith, a devotee can overcome the three types of miseries—physical, mental, and divine. As Chapter 10 describes, the Sadguru rewards this faith by placing Knowledge (Samvitti) in the devotee's palm and granting the attainment of liberation (Moksha) effortlessly.