How does Chapter 16 contrast the generosity of a Sadguru with that of the mythical wish-fulfilling gem, Chintamani?

In Chapter 16, a powerful analogy is used to demonstrate the unparalleled generosity of the Sadguru. The text explains that a wish-fulfilling gem, or Chintamani, can only grant what a person thinks of or desires. Its power is limited to the scope of human imagination and worldly wants. However, the Guru's gift transcends this entirely. The chapter describes the Guru as the most generous giver in all three worlds because He bestows upon His devotee the "Unthinkable Object," which is Brahman. This illustrates that the Guru provides the ultimate spiritual treasure, which is beyond conceptual thought or material desire.