How does the author of the Sai Satcharitra explain the inspiration behind writing the book and its intended effect on readers?

The author explains in Chapter 25 that the ability to write the book was not his own but a gift of grace from Sai Baba. He describes a moment where his meager intellect was suddenly endowed with courage and special knowledge to undertake the task. The purpose of the book, as he presents it, is for the salvation of devotees. He uses metaphors to describe its effect, calling it a "Shed of Nectar-like Sai Stories" to help devotees ward off the heat of worldly existence. Furthermore, he likens the life story to a Moonstone from which the nectar of Sai's tales flows, satisfying the spiritual thirst of devotees who listen with a focused mind.