Why is 'direct, full experience' considered the most vital quality for a Sadguru in Chapter 48?

In Chapter 48, 'direct, full experience' is presented as the cornerstone of a Sadguru's authority because it is the only true basis for guiding a disciple. The text argues that verbal knowledge alone, no matter how vast or sweetly explained, is 'verbally hollow' and lacks the power to transform. A teacher without personal experience cannot genuinely give anything of substance to a disciple. The chapter emphasizes that only someone who can impart this direct experience has the legitimate authority to enlighten others. This quality separates a true master from a mere scholar who only deals in principles without the taste of reality.