How does the author justify writing a new book about Sai Baba when other stories already existed, and what analogy is used to describe the vastness of Sai's life?

In Chapter 2, the author anticipates that listeners might question the need for another book given the existence of other texts about Sai Baba. To resolve this doubt, he uses a powerful analogy. He compares Sai’s life to a vast, deep ocean or an infinite mine of jewels. He then humbly compares his own effort to that of a Titwi bird trying to empty this immense ocean, a clearly impossible task. As explained in Chapter 2, this metaphor illustrates that Sai's life is so profound and limitless that it can never be completely described. Therefore, any attempt to capture and share even a small part of it is valuable and provides satisfaction.