Based on the philosophical teachings in Chapter 19, what is the true nature of the Soul and what is it distinct from?

In Chapter 19 of the Shri Sai Satcharitra, the true nature of the Soul is described with profound depth. The text explicitly states that the Soul is distinct from the physical and mental apparatus, namely the body, senses, mind, and life-force. Its inherent qualities are described as self-luminous, pure consciousness, changeless, and formless. As mentioned in chunk 1, the Soul is the Great Power, identified with the Purusha or Supreme Being, which is the ultimate goal where the senses and mind finally find rest. To illustrate its untainted nature, chunk 2 uses the analogy of a crystal, which remains pure and distinct from the colors it seems to reflect, just as the Soul remains pure despite its association with the body.