What is the significance of performing Parayan or Saptah of a Guru's biography, according to the text?

According to Chapter 0, performing Parayan or Saptah, which is a devotional reading of a detailed poetic Guru biography, serves a dual purpose. For the writer of the biography, it is a form of Guru service. Simultaneously, when other devotees study and perform these Parayans, the writer gains the merit of serving God in humanity (Jan-Janardan) and public service. The text emphasizes that for the devotees undertaking the study, this practice helps them achieve the purpose of their lives. This devotional act is a way a Sadguru accepts service from his devotees through the medium of books.