How does the text use metaphors to explain the pure, untainted nature of the Soul in the midst of Maya?

Chapter 19 employs powerful metaphors to clarify how the Soul remains pure and untainted despite its appearance in the world through the actions of Maya. The primary analogy used is that of a crystal, which may appear to take on the color of an object placed near it—be it red, black, or yellow—yet the crystal itself remains pure, colorless, and unchanged. This chapter draws further comparisons to illusory phenomena, such as a mirage on a plain, the false glitter of silver on a seashell, or mistaking a coiled rope for a snake. These examples from Chapter 19 serve to illustrate that the Soul is inherently distinct from and untainted by the superimpositions of the material world.