Why is the story of Damu Anna presented in the Sai Satcharitra, and what is its intended effect on the reader?

The story of Damu Anna is presented as a powerful, though brief, illustration of Sai Baba's protective love and mercy towards His devotees. Chapter 25 introduces this narrative as a report to show how Sai wards off misfortunes and grants the desires of those with unwavering faith. The author states that listening to this 'novel story' with reverence will fill the listener's heart with joy and help them understand that the Guru is an 'Ocean of Mercy.' The story's purpose is to reinforce the central theme of Sai's grace and to show how difficulties can vanish with faith.