How does Chapter 25 describe Sai Baba's nature and the importance of one-pointed devotion?

Chapter 25 portrays Sai Baba as an "ocean of mercy," the manifest incarnation of God, and the Supreme Brahman. It emphasizes that Sai desires "one-pointed devotion" above all else from his followers. The text states that a devotee who is faithful and filled with this kind of devotion will lack nothing in attaining their desires, as Sai Baba wards off their misfortunes and removes their suffering. To illustrate this point, the chapter references Krishna's words to Uddhava, equating the Sadguru with God's own form and stating that worshipping the Sadguru with love is the very definition of one-pointed devotion.