According to Chapter 48, what is the crucial difference between a person with mere verbal knowledge and a true Sadguru?

Chapter 48 of the Sai Satcharitra draws a sharp distinction between someone with hollow verbal knowledge and a true Sadguru. It explains that many can give sweet explanations of principles and possess vast scriptural knowledge, but this is considered "verbally hollow" if it lacks self-experience. A true Sadguru, on the other hand, is one who not only possesses complete verbal knowledge but is also a "giver of direct, full experience." The chapter emphasizes that someone who has no direct experience themselves cannot impart it to a disciple and should never be called a Sadguru. This ability to manifest the taste of pure experience is the key differentiator.