Chapter 16 draws a comparison between a Sadguru and a wish-fulfilling gem. Can you explain this analogy?

The comparison in Chapter 16 serves to highlight the supreme generosity of the Sadguru. It explains that a wish-fulfilling gem, or Chintamani, can only grant what a person thinks of or desires. However, the Guru's gift is far superior. As the text wonderfully puts it, the Guru gives the "Unthinkable Object," which is Brahman, to His devotee. This illustrates that the Guru is the most generous giver in all three worlds, bestowing the ultimate spiritual realization that transcends ordinary thought and desire, making him the ultimate refuge.