Based on Chapter 53, explain the role of the Guru's will and grace in the events surrounding the completion of the Shri Sai Satcharitra.

Chapter 53 presents the Guru's will and grace as the ultimate force guiding the completion of the Shri Sai Satcharitra. The narrative emphasizes that human plans are secondary, stating explicitly, 'Nothing happens by one's own will; Baba’s will is more powerful.' This is demonstrated by the fact that the original author, Hemadpant, could not finish the book despite his promise. The new author, feeling unqualified, leans entirely on the Guru's grace, praying to Sai-Narayana for compassion and inspiration. The chapter culminates in the belief that Sai Baba himself will write the summary, using the author as a mere instrument, thereby reinforcing the idea that the entire project is an act of divine will, not human effort.