What role does Goddess Saraswati play in the writing of the Sai Satcharitra, as explained in the first chapter?

As explained in Chapter 1, Goddess Saraswati's grace is considered indispensable for writing the Sai Satcharitra. The author acknowledges this by asking rhetorically, "Without the grace of this Goddess of Speech and Mother of the World, can any literature be achieved? How could I write this book?" He prays for her to make him an instrument to share the "nectar of the life of the capable Sai to everyone." The chapter describes her as the daughter of Brahma, holding a veena and riding a swan. Ultimately, the text reveals a deeper, non-dual understanding by stating that Sai himself is Goddess Saraswati, singing his own life story for his devotees.