What motivated the author to write the Shri Sai Satcharitra, and how did he perceive his own qualifications for the task, as detailed in Chapter 25?

In Chapter 25, the author explains that the desire to write the life story of Shri Sai arose in his heart, but he firmly believes that Sai Baba Himself inspired the work. He candidly admits his own perceived shortcomings, stating that he lacked the necessary authority, knowledge, or erudition for such a profound undertaking, referring to himself as a 'poor soul' and an 'ignorant person'. It was only when Sai gave him the command to 'Keep the records' that his 'meager intellect became endowed with courage and special knowledge.' The ultimate purpose of the book, as he understood it, was to awaken Sai's own devotees.