Can you explain the concept of the three bodies of the soul and their relationship to ignorance, as detailed in the source?

Chapter 50 elaborates on the soul's structure through the concept of its three bodies. The 'subtle' body is composed of the pranas, senses, mind, and intellect, which arise from the un-compounded great elements. From the compounded five elements, the 'gross' body, also called the 'Virat' or universal form, emerges. Most importantly, the text identifies the 'causal' body as the root cause for both the gross and subtle bodies. This causal body is nothing but the ignorance of one's own true form. This ignorance, when combined with the reflection of consciousness, is known as the 'Unmanifest' (Avyakruta).