Describe how the story of Damu Anna is introduced. What key principle about Sai's nature does this introduction highlight?

The story of Damu Anna is introduced in Chapter 25 not just as a biographical account, but as a clear illustration of a fundamental principle of Sai Baba's grace. The author prefaces the narrative by stating, "Once one-pointed faith is established, Sai wards off all the misfortunes of that devotee. He grants the desired objects and removes their suffering." Damu Anna's tale is framed as a "report that shows Sai's love for His devotees" and a story that reveals how the "Guru-Mother is an 'Ocean of Mercy.'" This introduction serves to highlight the core theme of the narrative: Sai's unwavering protection and compassionate response to the faith of his followers, promising that attention to the story will make one's own difficulties vanish.