Based on Chapter 1, describe the role and depiction of Goddess Saraswati and her relationship to Sai.

In Chapter 1 of the Sai Satcharitra, the author invokes Goddess Saraswati, the goddess of speech and knowledge, requesting her grace to compose the book. She is depicted as the daughter of Brahma, holding the Brahma-veena, riding a swan, wearing white clothes, and having red vermillion on her forehead. The author pleads for her to make him an instrument to narrate Sai's life story. Interestingly, this chapter also draws a 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," thus equating Sai with the divine source of knowledge and expression.