Can you explain what the 'causal body' is and how one can achieve liberation from it?

According to Chapter 50, the 'causal' (karana) body of the soul is also known as the 'Unmanifest' (Avyakruta). It is described as being the cause of pure ignorance and is associated with the reflection of consciousness. The text emphasizes that true liberation, or Moksha, is defined as abiding in one's own true form. This state can only be achieved through the removal of this causal body. The method for its removal is very specific: it requires attaining the knowledge of the unity of Brahman and the Soul. As Chapter 50 states, only when this knowledge occurs can ignorance be dispelled, leading to liberation. There is no other path to Moksha besides this realization.