Why does the author tell Damu Anna's story right after discussing his own process of writing the Satcharitra?

The author strategically places the story of Damu Anna to serve as a powerful illustration of the principles he just laid out. In the beginning of Chapter 25, the author explains that Sai Baba himself inspired him to write the Satcharitra to awaken devotees. To demonstrate the power of these stories, he transitions by stating, "Once one-pointed faith is established, Sai wards off all the misfortunes of that devotee." He then introduces Damu Anna's story as a "report that shows Sai's love for His devotees" and a way for the reader's mind to experience how the Guru-Mother is an "Ocean of Mercy," providing immediate proof of the book's purpose.