Can you explain the author's perspective on the importance of the listener's receptivity when hearing stories about Sai Baba, as described in Chapter 21?

In the beginning of Chapter 21, the author stresses the vital role of the listener's engagement. The narration is considered futile if the listener "does not sway upon hearing them," or if their "hair on the body does not stand on end." The author believes that effective storytelling about Baba should delight the listeners, cause their throats to choke with emotion, and bring tears of love and joy to their eyes. This perspective from Chapter 21 underscores that the spiritual impact of these stories is a two-way process, depending heavily on the audience's attentive and emotional participation.