How does the creation and study of a Guru's biography benefit both the author and the readers?

The text in Chapter 0 explains that writing a detailed poetic Guru biography is a form of Guru service for the author. When other devotees study this work and perform Parayans, the author also gains the merit of serving God in humanity (Jan-Janardan) and performing public service. For the devotees who read and study the biography, engaging with the text helps them to achieve the purpose of their lives. Therefore, the creation and dissemination of such a work creates a cycle of spiritual merit and purpose, benefiting the entire community of devotees as well as the writer.