What is the 'Unmanifest' or 'causal body' and what is its significance?

The 'Unmanifest' (Avyakruta), as described in Chapter 50, is also known as the causal (karana) body of the soul. It is defined as that which is qualified by the reflection of consciousness and is the cause of pure ignorance. The text clarifies that the ignorance of the Soul is the cause of this causal body. Its significance is immense, as it is the foundational layer of illusion that must be overcome to achieve liberation. Chapter 50 states that only the knowledge of the unity of Brahman and the Soul can lead to the removal of this causal body, which is a necessary step for attaining Moksha, or abiding in one's own true form.