Based on Chapter 10, what is the significance of the Guru in a devotee's life, and how is Sai Baba presented in this role?

According to Chapter 10, the Guru is paramount and is described as "the one eternal God" in contrast to other illusory gods. The text emphasizes that placing trust in the Guru is essential for crossing the "ocean of existence," much like one trusts a boatman to cross a worldly ocean. Sai Baba, as the Sadguru, fulfills this role by providing liberation and knowledge effortlessly to those with sincere devotion and faith. The chapter states that through pure service to the Sadguru, worldly existence is destroyed, and the three types of miseries are overcome, illustrating the Guru's central role in a devotee's spiritual salvation.