How does Chapter 25 describe Sai Baba's divine nature and the requirement of devotion from his followers?

Chapter 25 portrays Sai Baba in the highest spiritual terms, describing him as an "ocean of mercy," the "manifest incarnation of God," the "Supreme Brahman," and a "great Yogeshwar." The chapter emphasizes that Sai Baba desires "one-pointed devotion" from his followers. It reinforces this by quoting Krishna's words to Uddhava, "The Sadguru is indeed My own form," suggesting that worshiping the Sadguru with love is the path. The text explicitly states that a devotee who is faithful and filled with devotion will lack nothing in attaining their desires, as Sai wards off their misfortunes.