Based on Chapter 25, what constitutes 'one-pointed devotion' and what are its promised results?

Chapter 25 explains that 'one-pointed devotion' is what Sai Baba desires most from his followers. The text clarifies this concept by referencing Krishna's words to Uddhava: 'The Sadguru is indeed My own form.' Therefore, the chapter suggests that one-pointed devotion is achieved when one worships the Sadguru, like Sai Baba, with love as the very form of God. The promised results of this unwavering faith are significant. The chapter states that 'A devotee who is faithful and filled with devotion lacks nothing in attaining their desires.' It further promises that Sai 'wards off all the misfortunes of that devotee,' 'grants the desired objects,' and 'removes their suffering,' showcasing his immense grace.