How does the author use the story of Damu Anna to illustrate the power of faith in Sai Baba?

In Chapter 25, the author strategically introduces the story of Damu Anna to serve as a clear demonstration of Sai Baba's divine power and mercy. Before narrating the story, the text establishes a premise: 'Once one-pointed faith is established, Sai wards off all the misfortunes of that devotee.' The story of Damu Anna, a wealthy but initially childless man who was later blessed with sons through Sai's grace, is presented as a 'report that shows Sai's love for His devotees.' The author calls the story 'novel' and 'pure in its meaning,' promising that by listening, one's mind will experience how the 'Guru-Mother is an Ocean of Mercy.' Thus, Damu Anna's account is framed as tangible proof of the rewards of unwavering devotion.