How does the author of the Sai Satcharita describe his role and the process of writing the book?

In Chapter 3, the author portrays himself as a humble and unworthy instrument chosen by Sai Baba. He describes himself as "the most insignificant of all" and questions his own merit for receiving such a favor from the "ocean of mercy." He confesses his inability to grasp Baba's deep greatness but proceeds out of obedience to Baba's command. Crucially, he explains that his personal ego or "I-ness" was taken away by Baba when he began to write. The author asserts that Baba "writes His own story Himself; the glory belongs to Him," positioning himself merely as a conduit for a divine act, much like a flute that only makes music when a player breathes into it.