How does the introductory story of Damu Anna illustrate Sai Baba's grace?

The story of Damu Anna serves as a powerful illustration of Sai Baba's grace and mercy towards his followers. Chapter 25 prefaces his story by stating that once one-pointed faith is established, Sai wards off all misfortunes and grants the desired objects of his devotees. Damu Anna's life is a direct example of this principle. Despite being a wealthy man, he suffered from the sorrow of being childless, even with two wives. The chapter recounts that it was through Sai's divine blessings that he was finally blessed with sons. This shows, as the text suggests, Sai's readiness to protect His devotees and how the Guru-Mother is an "Ocean of Mercy."