Can you summarize the primary characteristics of a true Sadguru as described in Chapter 48?

Chapter 48 of the Shri Sai Satcharitra outlines several key characteristics of a true Sadguru. A Sadguru is defined as one who gives direct, full experience, going beyond mere verbal knowledge which is described as hollow. They are supremely selfless, wishing to sacrifice for the disciple rather than receiving service. The chapter notes that a Sadguru is free from ego and pride in their scholarship, treating the small and the great as equals. They hold a fatherly love for the disciple, viewing them as the Supreme Brahman, and do not depend on the disciple for their livelihood. Their presence is a "storehouse of supreme peace."