What does the text mean by the 'Unmanifest' or 'Avyakruta', and how does it relate to the soul and ignorance?

According to Chapter 50, the 'Unmanifest' (Avyakruta) is described as the 'causal' (karana) body of the soul. This state is caused by pure ignorance, or Avidya, and is considered the unevolved origin point. The text clarifies that this causal body is neither with parts nor without parts, existing in a unique state. The only way to remove this causal body and the ignorance it represents is through the profound realization of the unity between Brahman and the Soul. Chapter 50 states that achieving this knowledge and abiding in one's own true form is what constitutes liberation, or Moksha.