How is the story of Damu Anna framed and introduced in the Sai Satcharitra, and for what purpose?

The story of Damu Anna is introduced in Chapter 25 as a powerful testament to Sai Baba's love and mercy towards his followers. The author presents it as a report that will show how Sai protects devotees with one-pointed faith, removes their suffering, and grants their wishes. The story is described as being short but "very pure in its meaning." The stated purpose is to fill the listeners' hearts with joy and to help their difficulties vanish by demonstrating that the Guru-Mother is an "Ocean of Mercy." The reader is urged to listen with an unreserved and focused mind to fully grasp this profound lesson.