What specific qualities does Chapter 48 say are insufficient for one to be considered a Sadguru?

Chapter 48 of the Shri Sai Satcharitra explicitly lists several qualities that, on their own, do not qualify someone as a Sadguru. The text cautions that one should not be swayed by mere intellectual or ritualistic prowess. It states that those who have studied the Vedas or the six Shastras, or can explain Vedanta, are not necessarily Sadgurus. Similarly, practices like controlling the breath (Pranayama) or wearing heated marks (Taptamudra) are not definitive signs. Even the ability to give pleasing talks about Brahman or dispense mantras is insufficient if the person lacks direct self-experience, which the chapter describes as the only true basis for spiritual authority.