What does the text say about the 'causal body' and how to achieve liberation from it?

According to the teachings in Chapter 50, the 'causal' (karana) body of the soul is also known as the 'Unmanifest' (Avyakruta). This state is the cause of pure ignorance and is considered 'Unevolved.' The text clarifies that there is only one way to remove this causal body: through the knowledge of the unity of Brahman and the Soul. This removal of ignorance is what leads to liberation, or Moksha. The scripture defines Moksha simply as 'abiding in one's own form,' emphasizing that no other form of liberation exists.