How can writing about Sai Baba be considered a form of service that benefits a wider community?

According to the preface in Chapter 0, writing a detailed biography of a Guru is a profound form of service. The writer performs Guru service through the act of creation. Furthermore, this service extends to the wider community when other devotees study and perform devotional readings (Parayans) of the work. By engaging with the text, these devotees also achieve the purpose of their lives. This act of writing and subsequent community engagement allows the writer to gain the merit of serving both the Guru and humanity, referred to as "God in humanity (Jan-Janardan)" and public service.