How does the author of the Shri Sai Satcharitra justify his writing of the book in Chapter 25?

In Chapter 25, the author explains that while a desire to write the life story of Shri Sai arose in his heart, he felt he lacked the necessary authority, knowledge, or erudition for the task. However, he states that Sai Baba himself provided the inspiration and 'made me write the book with my own hands to awaken His own devotees.' The author attributes his newfound courage and knowledge to Sai Baba's command. He views the resulting work not as his own but as the 'grace and "Prasad" of the Saint's feet,' written for the salvation of devotees, as detailed in the narrative's purpose section of Chapter 25.