Chapter 19 uses several analogies to explain complex ideas. Could you explain the meaning behind the analogy of the crystal?

According to Chapter 19, the analogy of the crystal is used to explain the nature of the Soul. Just as a pure crystal can appear red, black, or yellow depending on the color of an object placed near it, the Soul appears to take on the characteristics of the world due to the influence of Maya. However, the chapter clarifies that, like the crystal, the Soul itself remains distinct from these colors, forever pure, changeless, and untainted. This illustration helps to understand how the Soul, though appearing to be part of the material world, is fundamentally separate, self-luminous, and pure consciousness.