What is the author's perspective on effective storytelling and listening as mentioned at the beginning of Chapter 21?

At the start of Chapter 21, the author reflects on the ideal interaction between a speaker and a listener. He suggests that a speaker's words are wasted if the listener does not "sway upon hearing them" or if the hair on their body does not stand on end. He considers narrations futile if they do not delight the audience, cause their throats to choke with emotion, and bring tears of love and joy to their eyes. This sets the stage for the stories of Sai Baba, implying that they should be received with an open heart and deep feeling to be truly understood and appreciated.