What is the primary focus and introductory theme of Chapter 51 in the Shri Sai Satcharita?

Chapter 51 begins with devotional salutations and establishes its purpose through analogies, suggesting that spiritual narratives exist to satisfy listeners, just as sandalwood soothes heat or rain brings joy. The chapter explains that listening to the Sai Charitra purifies both the speaker and the listener. It then recaps the previous chapter's theme on destroying ignorance by drawing a parallel with the Bhagavad Gita, where Krishna asks Arjuna about the destruction of his delusion. As outlined in Chapter 51, it then serves as a prelude, announcing the upcoming stories about how Kakasaheb was first established in Shirdi and three other tales intended to soothe the hearts of devotees.