How does the author of the Satcharitra describe his own role and capability in writing the book in Chapter 30?

In Chapter 30, the author expresses profound humility, viewing himself as merely an instrument for Sai's work. He questions his own credentials, stating, 'what qualification do I have? Who takes up this task upon themselves?' He firmly believes that the work belongs to Sai, who gets it accomplished through him. As the text from Chapter 30 says, 'He whose work it is, He Himself gets it accomplished. What burden is there on me then?' The author credits Sai as the 'illuminator of my speech' and the 'capable lamp of knowledge,' whose grace stilled his wavering mind and made the entire effort feel effortless.