What is the author's philosophy on effective spiritual storytelling as described at the beginning of Chapter 21?

At the start of Chapter 21, the author expresses a distinct philosophy on the purpose of spiritual narration. He believes that stories and words are futile and have "gone in vain" if they do not produce a profound emotional and physical reaction in the listener. He specifies that narrations are only successful if the listeners are delighted, their throats choke up with emotion, the hair on their bodies stands on end, and tears of love and joy flow from their eyes. This sets a high bar for spiritual discourse, suggesting its goal is not mere intellectual understanding but a deeply transformative experience. He then praises Sai Baba's methods, calling his speech captivating and his actions innovative, implying they meet this very standard.