What is the dual benefit of writing and studying a Guru's biography, according to the text?

The preface outlines a dual benefit that strengthens the connection between the Guru, the writer, and the community of devotees. As stated in Chapter 0, when a writer creates a detailed poetic Guru biography, they are performing Guru service. Simultaneously, when other devotees study and perform Parayans of that work, the writer gains the merit of serving 'God in humanity' (Jan-Janardan) and performing public service. The devotees who study the work also benefit by achieving the purpose of their lives, creating a virtuous cycle of service and spiritual growth that binds the community together.