What is the dual benefit of writing and studying a detailed Guru biography like the Shri Sai Satcharita?

According to Chapter 0, there is a profound dual benefit to the creation and study of a detailed Guru biography. Firstly, for the writer, the act of creating a detailed poetic Guru biography is a form of direct Guru service. Secondly, a broader, communal benefit arises when other devotees also study and perform Parayans of the work. In this case, the writer gains the merit of serving God in humanity (Jan-Janardan) and performing a public service. Simultaneously, those other devotees who participate in the study are also guided toward achieving the purpose of their own lives. This creates a virtuous cycle of service and spiritual growth within the community.