Based on the provided text, what is the underlying spiritual lesson intended by sharing the story of Damu Anna?

The narration of Damu Anna's story serves a deeper spiritual purpose beyond simple storytelling. As Chapter 25 explains, the story is a "report that shows Sai's love for His devotees" and is meant to help the listener's mind experience how the Guru-Mother is an "Ocean of Mercy." The primary lesson is that when a devotee establishes "one-pointed faith," Sai actively protects them, wards off their misfortunes, and grants their desires. Damu Anna's experience of being blessed with children after being childless is a direct illustration of this principle, showing Sai's readiness to protect and provide for those devoted to Him.