How does the act of writing and reading a Guru's biography, like the Sai Satcharita, serve as a form of public service that strengthens the devotee community?

The preface in Chapter 0 explains that studying a detailed poetic Guru biography is a profound form of service. The writer performs Guru service by creating the work. Simultaneously, when other devotees study and perform Parayans of that biography, the writer gains the merit of serving God in humanity (Jan-Janardan) and performing public service. The text emphasizes that these other devotees also achieve the purpose of their lives through this study. Therefore, the creation and communal reading of a work like the Shri Sai Satcharita becomes a virtuous cycle, where the writer's service enables the spiritual growth of the entire community, binding them together in a shared devotional practice.