What are the qualities of a powerful spiritual narration, according to the introductory verses of Chapter 21?

The beginning of Chapter 21 sets a high standard for effective spiritual storytelling. It suggests that a speaker's words are considered successful only if they evoke a profound, visceral reaction in the listener. The text describes this reaction as the listener swaying upon hearing them and the hair on their body standing on end. Conversely, narrations are deemed 'futile' if they fail to delight the audience, cause their throats to choke up with emotion, or bring tears of love and joy to their eyes. This introduction implies that stories about saints like Sai Baba should be so captivating that they produce a deep emotional and physical response.