Based on the provided text, what is the purpose of narrating the story of Damu Anna?

The narration of Damu Anna's story serves a clear didactic purpose within the Shri Sai Satcharitra. As explained in Chapter 25, the story is a report that shows Sai's profound love and readiness to protect His devotees. It is intended to fill the listener's heart with joy and demonstrate how the "Guru-Mother is an Ocean of Mercy." The author states that by listening to this story with reverence, one's difficulties will vanish. It functions as a powerful example to prove that once one-pointed faith is established, Sai wards off all misfortunes and grants the desires of that devotee.