How does Chapter 48 differentiate between a teacher with mere verbal knowledge and a true Sadguru?

Chapter 48 draws a sharp distinction between a teacher with only verbal knowledge and a genuine Sadguru. It states that while some teachers may offer very sweet explanations of principles and possess vast verbal knowledge, this is considered "verbally hollow" if it lacks self-experience. As detailed in Chapter 48, a true Sadguru is one who not only possesses complete verbal knowledge but is also a giver of direct, full experience. The text asserts that someone who does not have this direct experience themselves cannot give anything meaningful to a disciple and should never be called a Sadguru.