How does the beginning of Chapter 21 characterize the ideal relationship between a narrator and a listener?

The start of Chapter 21 outlines the qualities of an effective spiritual narration and an engaged listener. It posits that a speaker's words are wasted if the listener does not "sway upon hearing them" or if the "hair on the body does not stand on end." The chapter deems narrations futile if they fail to delight the audience or evoke a deep emotional response, such as the throat choking up with emotion or tears of love and joy flowing from the eyes. As described in Chapter 21, this dynamic highlights that the power of a story is only realized through the attentive and heartfelt reception by the listener.