According to Chapter 49 of the Sai Satcharitra, what is the significance of the Guru in a devotee's life?

Chapter 49 establishes the Guru as the supreme focus of a devotee's life. It states that love for the Guru's feet is the only true wealth and that meditation on one's Guru is the greatest of all spiritual practices, surpassing pilgrimages, vows, sacrifices, charity, and even the singing of Hari's name. The author emphasizes that Sai alone is the object of meditation and worship for His devotees, serving as their secret treasure. True understanding comes only through surrendering at the Sadguru's feet, as they are the form of Shri Hari.