Chapter 48 critiques certain spiritual teachers. What specific characteristics are identified as insufficient for one to be considered a Sadguru, and why is direct experience so heavily emphasized?

Chapter 48 of the Sai Satcharitra critiques teachers who may appear wise but lack the core qualities of a Sadguru. It specifies that knowledge of the Vedas or six Shastras, practicing pranayama, or giving eloquent talks on Brahman are not, by themselves, sufficient qualifications. The text also criticizes those who give mantras without any certainty of when the disciple will achieve results. The chapter argues such knowledge is "verbally hollow" if not backed by the teacher's own self-experience. Direct experience is paramount because only an experienced person can manifest the true taste of spiritual realization for others, as the chapter asks, "One who does not have experience himself, what will he give to the disciple?"