According to Chapter 49, what is the author's perspective on his own role in writing the Sai Satcharita and Sai Baba's influence on the process?

In Chapter 49, the author presents himself not as the creator, but as a mere instrument for a divine task. He explicitly states that the "merciful Sainath, entering into my mind, got His own book written." The author claims that Sai Baba is the true composer and writer of the Satcharita. If the author forgets the narrative or feels lazy, Sai provides remembrance at the right time and manifests stories so unexpectedly that the author is compelled to write. The book was started at Sai's prompting to share His unfathomable stories with devotees and also to fulfill the author's own desires.