What does the author of the Sai Satcharitra reveal about his own role and feelings while writing the book in Chapter 30?

In Chapter 30, the author expresses deep humility, feeling he is merely an instrument for a divine task. He questions his own qualifications, stating, "what qualification do I have?" and concludes that the work is not his own, but that Sai Baba Himself gets it accomplished. The author beautifully describes Sai as the "illuminator of my speech" and the "capable lamp of knowledge" that destroys the darkness of ignorance. This profound faith in Sai as the true doer is what stilled the author's wavering mind and made the monumental effort of writing feel effortless, as mentioned within this chapter.