How does the creation and study of a Guru's biography, like the Shri Sai Satcharita, serve both the individual devotee and the wider community?

The text in Chapter 0 details a two-fold benefit. Firstly, for the writer of a detailed poetic Guru biography, the act of creating the work is considered a form of Guru service. Secondly, when other devotees study and perform Parayans of that same work, the writer gains the additional merit of serving God in humanity, or 'Jan-Janardan,' and performing public service. Simultaneously, these other devotees who engage with the biography are also guided toward achieving the purpose of their lives. This shared practice of study creates a communal bond and a collective spiritual benefit.