What makes the Shri Sai Satcharita an enduring and impactful spiritual book, according to its preface?

According to its preface in Chapter 0, the Shri Sai Satcharita is considered an enduring and impactful text primarily because it is a "grace-filled (Prasad-janya) book." The text argues that a poem written solely on the strength of scholarship, without the Guru's grace, inspiration, and divine gift, will not leave a lasting impression on seekers. The Shri Sai Satcharita is believed to possess these three essential qualities. Its creation is described as the very fruit of Sai Baba's grace falling upon the author, Annasaheb Dabholkar. This divine blessing ensures the book is not just a biography but an excellent poem that will be liked by any seeker-devotee and studied through daily Parayans.