What does Chapter 28 of the Sai Satcharitra teach about the nature of a Sadguru and their role in a devotee's life?

Chapter 28 explains that a Sadguru, like Sai Baba, embodies both the divine word (Shabda-Brahma) and the Supreme Being (Para-Brahman). The chapter draws a poignant comparison, stating that while a father gives birth to the physical body which is subject to death, a Guru's compassion is greater because he removes the very cycle of birth and death. Furthermore, it describes how a Sadguru actively nurtures devotion by appearing in devotees' dreams, correcting their bad habits like addiction to liquor, and alleviating their troubles, thereby creating an enduring love for his feet.