Based on Chapter 1, what is the significance of invoking Goddess Saraswati, and how is she related to Sai Baba?

In Chapter 1 of the Sai Satcharitra, Goddess Saraswati is invoked as the goddess of speech and knowledge, whose grace is essential for any literary achievement. The author bows to her, acknowledging, "Without the grace of this Goddess of Speech and Mother of the World, can any literature be achieved? How could I write this book?" The text then creates a direct parallel by stating, "Sai himself is Goddess Saraswati, holding the Omkara-veena in hand, singing his own life story for the salvation of his devotees." This signifies that the author is merely an instrument, and it is Sai, in the form of Saraswati, who is narrating his own life story through the author to benefit his followers.