According to Chapter 25, what is the primary purpose and origin of the Shri Sai Satcharitra?

Chapter 25 explains that the Shri Sai Satcharitra was written for the salvation and awakening of Sai Baba's devotees. The author explicitly states that although he felt he lacked the necessary knowledge or authority, he was directly inspired and commanded by Sai Baba to write the book. This chapter describes the text as a form of grace and "Prasad" from the Saint's feet, a "Shed of Nectar-like Sai Stories" meant for devotees to find relief from the struggles of worldly existence. The writing itself is portrayed as a miraculous act of Sai's grace, which endowed the author with the courage and special knowledge required for the task.