According to Chapter 48 of Sai Satcharitra, what is the main distinction between a true Sadguru and someone who merely possesses scriptural knowledge?

Chapter 48 makes a clear distinction by stating that a true Sadguru is defined by self-experience, not just verbal or scriptural knowledge. The text explains that those who simply study the Vedas, explain Vedanta, or have vast verbal knowledge are not considered Sadgurus by the wise if they lack direct experience. This chapter emphasizes that such knowledge is "verbally hollow." A true Sadguru, in contrast, is described as a "giver of direct, full experience" and possesses the authority to enlighten disciples because they have experienced the truth themselves. The chapter posits that one who has no direct experience has nothing of substance to give a disciple.