Based on this chapter, what are the characteristics and benefits of having one-pointed devotion to a Sadguru like Sai?

Chapter 25 portrays Sai as the supreme embodiment of mercy who desires one-pointed devotion from his followers. This type of devotion is defined as worshipping a Sadguru with love, citing Krishna's words to Uddhava that 'The Sadguru is indeed My own form.' The text promises significant benefits for a devotee who is faithful and filled with such devotion. It states that Sai wards off all misfortunes, removes suffering, and grants the desired objects for those with one-pointed faith. The author introduces the story of Damu Anna specifically to illustrate this principle and show Sai's immense love for his devotees, reinforcing the idea that this unwavering faith is the key to overcoming worldly troubles and attaining one's desires.