Based on Chapter 1, analyze the author's stated need for invoking Goddess Saraswati and the subsequent identification of Sai with her.

The author, in Chapter 1, expresses a deep sense of humility and dependence on divine grace for writing the book. He bows to Goddess Saraswati, the daughter of Brahma and the Goddess of Speech, acknowledging that without her mercy, no literature can be achieved. He asks her to make his tongue her swan to ride upon. This invocation highlights the perceived difficulty of the task. Following this, the text makes a profound theological statement: "Sai himself is Goddess Saraswati, holding the Omkara-veena in hand, singing his own life story for the salvation of his devotees." As explained in Chapter 1, this means the author views the very act of writing as being inspired and executed by Sai, who embodies the divine principle of knowledge and speech, essentially writing his own story through the author.