How does Damu Anna's story show what 'one-pointed devotion' means?

The story of Damu Anna is presented in Chapter 25 as a prime example of how one-pointed faith in Sai Baba yields blessings and protection. The chapter explicitly states that once such faith is established, Sai 'wards off all the misfortunes of that devotee' and 'grants the desired objects.' Damu Anna, a devoted follower from Ahmednagar, experienced this directly. He was a wealthy man with two wives but no children, a source of suffering. Through Sai's grace, he was blessed with sons. His unwavering devotion is also shown through his long-standing vow to provide a flag for the Ram Navami festival. Thus, his life illustrates the principle that Sai, the 'Ocean of Mercy,' readily protects and provides for those who worship Him with one-pointed devotion.