What are the primary characteristics of a Sadguru as defined in Chapter 48 of the Sai Satcharitra?

According to Chapter 48 of the Shri Sai Satcharitra, a true Sadguru possesses several distinct qualities that set them apart from teachers who only have verbal knowledge. A Sadguru is one who can give a disciple direct, full experience, not just theoretical explanations. The chapter emphasizes that a Sadguru is free from egoism, never considering the disciple insignificant. They possess fatherly love for their followers and would sacrifice their own body for the disciple's sake rather than expecting service. Furthermore, as described in Chapter 48, the place of a Sadguru is a storehouse of supreme peace where everyone, great or small, is treated equally.