What is the central message about devotion presented in the beginning of Chapter 25?

The central message about devotion in Chapter 25 is the concept of 'one-pointed devotion.' The text states that Sai Baba, as the supreme embodiment of mercy, desires only this form of devotion. It explains that a devotee who is faithful and filled with this singular focus will lack nothing in attaining their desires. As Chapter 25 clarifies by quoting Krishna's words to Uddhava, 'The Sadguru is indeed My own form,' emphasizing that worshipping the Sadguru with love is precisely what constitutes one-pointed devotion. This concept is the foundation for understanding the relationship between Sai and His devotees, like Damu Anna, whose story is introduced as an illustration of this principle.