Why did the author of the Shri Sai Charitra feel compelled to write the book, and what was his mindset?

According to Chapter 25, the author felt an internal desire to write the life story of Shri Sai, but he also felt deeply unqualified for the task. He describes himself as a "poor soul" who lacked the necessary authority, knowledge, or erudition. Despite his feelings of inadequacy, he believed that Sai Baba Himself provided the inspiration and command to create the work. The author states that Sai "made me write the book with my own hands to awaken His own devotees." This divine command gave his "meager intellect" the courage and special knowledge required to complete the profound task, viewing the resulting book as the grace and "Prasad" of the Saint's feet.