Analyze the theme of divine will versus human agency as presented in the concluding chapter of the Shri Sai Satcharitra.

Chapter 53 masterfully explores the theme of divine will superseding human plans. It begins by noting Hemadpant's unfulfilled promise to write a summary, stating unequivocally, 'Nothing happens by one's own will; Baba’s will is more powerful.' The author who takes up the task repeatedly expresses his own feelings of inadequacy, calling himself a 'fool with a dull intellect.' He surrenders his ego and prays for divine grace, believing that only through the Guru's power can the work be completed. This sentiment culminates in the profound declaration from Chapter 53 that Sai Baba himself will be the one to write the summary, with the author's mouth being 'merely an instrument,' reinforcing that all actions are ultimately orchestrated by the Sadguru.