What is the author's stated motivation for writing Chapter 49, and what challenges does he face in doing so?

In Chapter 49, the author explains his motivation for writing stems from a desire to share the bliss of Sai's stories with others. He compares this experience to tasting a "sweet delicacy" and feeling compelled to share it with friends, believing the joy "doubles" when shared. The primary challenge he faces is the sheer impossibility of capturing the Sadguru's "unfathomable greatness" with words. He notes that even the Vedas and Puranas grew weary of this task and that even transcendental speech fails to describe it. Despite knowing that silence is the real praise, the qualities of Sai make him forget this and compel him to write.