How does studying a Guru's biography benefit both the reader and the author?

According to the preface in Chapter 0, studying a detailed poetic biography of a Guru serves multiple purposes. For the author, the act of writing is a form of Guru service. For other devotees who study and perform Parayans (devotional readings) of the work, they are also able to serve the Guru and achieve the purpose of their lives. The text further explains that when others study the biography, the writer gains the merit of serving God in humanity, referred to as Jan-Janardan, and performing a valuable public service. This illustrates how a Sadguru can accept service from a wide congregation of devotees through a single literary work.