What does Chapter 10 reveal about the power and significance of the Sadguru for a devotee?

Chapter 10 profoundly emphasizes the supreme role of the Sadguru in a devotee's life. It states that by placing faith in the Guru's feet, one's fate can be changed, as if a nail were struck over the lines of destiny. The chapter explains that pure service to the Sadguru completely destroys the worldly existence (Samsara) and helps one cross the three types of miseries. The Guru is described as the boatman who guides devotees across the ocean of existence, and upon seeing their faith, He grants them Knowledge (Samvitti) and the effortless attainment of liberation (Moksha).