According to Chapter 28, what are the qualities that make Sai a Sadguru, and how is a Guru's compassion different from a father's?

Chapter 28 explains that Sai Baba embodies the qualities of a Sadguru because He is proficient in both Shabda-Brahma (the divine word) and shows the signs of Para-Brahman (the Supreme Being). The text states that a Sadguru is one who is established in their own true nature and can impart teachings. This chapter further highlights the unique compassion of a Guru by contrasting it with a father's role. While a father gives birth to a body that is subject to death, the Guru's great compassion is shown in His ability to remove the cycle of both birth and death for the devotee.