What qualities does the author believe a powerful story should have, based on the beginning of Chapter 21?

At the beginning of Chapter 21, the author, Hemadpant, outlines the characteristics of an impactful narration. He suggests that a speaker's words are wasted if the listener is not deeply moved. According to his description, a truly effective narration should cause the listener's hair to stand on end, their throat to choke up with emotion, and tears of love and joy to flow from their eyes. The author believes a story is futile if it does not bring delight to the listeners. This sets the stage for the emotionally and spiritually resonant stories of Sai Baba that he intends to share.