Can you summarize the main points and themes discussed in Chapter 40 of the Shri Sai Satcharitra?

Chapter 40 of the Shri Sai Satcharitra begins by praising Shri Sai Samarth for explaining both worldly interests and supreme spiritual goals. It describes how He performs shaktipat (transmission of spiritual energy) and destroys the sense of duality, comparing the union of a devotee with the Guru to a river merging with the ocean. The chapter also delves into the creation of the book, stating that the author, Hemad, is merely a puppet and Sai is the true puppeteer who is performing His own story. It is emphasized that all virtues and faults in the text belong to Sai. Finally, as mentioned in Chapter 40, it sets the stage for the next story by highlighting that Sai is deeply satisfied by a devotee's loving offering of food, much like a compassionate mother.