Why does the author, Hemadpant, believe it is important to recount the stories of saints like Sai Baba?

In Chapter 43, Hemadpant expresses that remembering the glory of God's devotees and engaging in their bhajan or kirtan is a powerful method for purification. He states that to wash away the filth of accumulated sins and make the inner self pure, no other easy means can be found. The author also acknowledges that while the news of a body's end may not please the heart, the passing of saints and sages serves to purify both the listeners and the speakers. He sees himself as a devotee at Sai's feet, sketching his life story to increase its greatness and bring glory to the religion of bhajan.