What is the significance of Parayans and Saptahs as mentioned in the preface, and how does this tradition relate to Guru service?

The preface of the Shri Sai Satcharita explains that the practice of performing Parayans (devotional readings) and Saptahs (weekly recitations) is a very ancient tradition, dating back to the Vedic era. As mentioned in Chapter 0, these practices are commonly applied to great works like the Vedas, Ramayana, and Dnyaneshwari. This tradition is directly linked to the highest form of Guru service. The author suggests that the most suitable form of service is to write a Sadguru's biography in poetry specifically so it can be used for Parayans and Saptahs. This act of regular, devoted recitation is presented as a powerful and time-honored method for securing the Guru's grace.