Can you provide a summary of the characteristics of a Sadguru, using only the information from Chapter 48?

Based on the teachings in Chapter 48, a Sadguru is defined by profound inner qualities rather than external knowledge. A Sadguru possesses direct, full experience and has the authority to enlighten disciples, unlike those with only hollow verbal knowledge. The chapter describes a Sadguru as someone who is free from ego, treats all people as equals, and harbors a storehouse of supreme peace. Most importantly, a Sadguru is selfless, showing fatherly love to the disciple and being willing to sacrifice their own body for the disciple's sake, never desiring service or livelihood in return.