According to Chapter 49, what is the author's motivation for writing the Sai Satcharita, and what role did Sai Baba play in its creation?

In Chapter 49, the author explains that his motivation for writing stems from a desire to share the spiritual bliss he experiences, comparing it to sharing a sweet delicacy at a feast with friends so the joy doubles. He admits that while silence is the truest praise for the unfathomable Sadguru, he cannot remain still after witnessing Sai's wondrous Leelas. The author emphasizes that Sai Baba is the true force behind the book's creation. He states that the merciful Sainath entered his mind, prompted him to start the Satcharita, provided remembrance of the stories whenever he forgot, and ultimately got His own book written through the author, fulfilling the author's deepest desires in the process.