According to this text, what are the defining characteristics of a Satguru and what is the effect of their company?

The text describes a Satguru as having an unfathomable form and being a celibate (Urdhvareta) known to all. He treats men with a sense of brotherhood and women as his sisters or mothers. Chapter 37 explains that those who try to understand the cause behind each of his actions eventually become exhausted and can only sit in quiet amazement. Being in the company of such a Satguru is said to help the wisdom one obtains remain steady and unshakable until death. It also fosters a great increase in the spirit of service and fixes unwavering devotion at his feet, allowing one to see Divinity in all beings.