How does the author of the Sai Satcharitra introduce the story of Damu Anna and for what purpose?

The author introduces the story of Damu Anna in Chapter 25 by first setting a spiritual context, describing the Sai Satcharitra as a 'Shed of Nectar-like Sai Stories' that wards off worldly heat. The narrative about Damu Anna is then presented to illustrate a key principle: that Sai Baba protects devotees who have one-pointed faith, grants their desires, and removes their suffering. The text explicitly states the story will show how the 'Guru-Mother is an "Ocean of Mercy"' and that listening to it will bring joy to the hearts of devotees, demonstrating Sai's readiness to protect them.