What is the significance of invoking Goddess Saraswati in Chapter 1 of Sai Satcharitra?

According to Chapter 1, the author invokes Goddess Saraswati, the daughter of Brahma, because her grace is essential for any literary work to be achieved. The author describes her as the Mother of the Universe and the Vedas and asks her to make him an instrument to share the nectar of Sai's life with everyone. The text then beautifully reveals that Sai himself is Goddess Saraswati, holding the Omkara-veena and singing his own life story for the salvation of his devotees, highlighting Sai's embodiment of divine knowledge and speech.