What are the dual benefits of a devotee writing a detailed biography of their Guru, and how does this serve the wider spiritual community?

According to Chapter 0, writing a detailed poetic biography of a Guru provides a dual benefit. Firstly, the writer themselves performs a direct form of Guru service through the act of creation. Secondly, and just as importantly, this act serves the broader community. When other devotees study and perform 'Parayans' of the work, the writer accrues the merit of serving God in humanity (Jan-Janardan) and performing public service. This creates a virtuous cycle where the writer's service enables the spiritual growth of the entire congregation, helping other devotees achieve the purpose of their lives through the shared study of the Guru's biography.