The Sai Satcharitra discusses individuals who may seem like gurus but are not. According to Chapter 48, what traits do these individuals exhibit that differentiate them from a true Sadguru?

Chapter 48 of the Sai Satcharitra clarifies that not all who appear spiritual are true Sadgurus. It cautions against those who merely study the Vedas, practice breath control (Pranayama), or wear heated marks (Taptamudra). The chapter also notes that those who simply please audiences with talks on Brahman or give out mantras without any certainty of when the disciple will see results are not Sadgurus. A key distinction highlighted in Chapter 48 is that these individuals may possess vast verbal knowledge that sounds sweet, but it is ultimately 'verbally hollow' because it lacks the essential component of direct self-experience, which a true Sadguru possesses and can impart.