How does Chapter 45 contrast the temporary nature of Sai Baba's physical incarnation with his eternal spiritual presence?

Chapter 45 beautifully contrasts the physical and the spiritual. It acknowledges the end of the incarnation, stating the physical "Sai-form" has vanished and is now lost to sight. However, the chapter immediately counters this sense of loss by highlighting Sai's eternal presence. It explains that when the work of the incarnation was complete, Sai established His form in the hearts of devotees through meditation and left behind the book as His "literary form." This narrative, as detailed in Chapter 45, teaches that while the physical body is transient, the Guru's true form is eternal and remains accessible through inner devotion and the sacred stories.