What is the central theme of Chapter 49 of Sai Satcharitra regarding devotion to a Sadguru?

Chapter 49 of the Sai Satcharitra emphasizes that the Sadguru's greatness is beyond description, so much so that even the Vedas and Puranas grew weary of praising Him. The author notes that while silence is the truest praise, the bliss of Sai's stories compels him to write. The chapter teaches that a true devotee is one who is completely devoid of ego and the arrogance of knowledge. It concludes that while many spiritual practices exist, the meditation on one's own Guru is the greatest of all, as Sai is the ultimate resting place for his devotees.