How does a Sadguru assist devotees who feel spiritually stagnant or uninspired?

According to the preface in Chapter 0, a Sadguru utilizes books as a means to provide service and guidance to devotees. This happens in two ways: either the Sadguru authors great spiritual works themselves, like Shri Dnyaneshwari, or they inspire devotees to write their biographies. For devotees feeling stagnant, engaging in the study and devotional reading (Parayan) of these detailed biographies serves as a form of Guru service. This sacred practice helps devotees connect with the Guru's grace and ultimately helps them achieve the purpose of their lives.