Can you describe the ultimate goal of human life and the hierarchy of reality as detailed in Chapter 19?

Chapter 19 explains that the ultimate purpose and duty of human birth is the attainment of the Supreme Self, which is characterized by eternity, fearlessness, liberation, and independence. The chapter also outlines a hierarchy of subtlety to define this ultimate reality. It starts with the Soul (Atma), which is a Great Power. Subtler than the Soul is the Unmanifest (Avyakta), which is also called Maya or Space. Finally, as Chapter 19 reveals, subtler than all of these is the Purusha, or the Supreme Being. This is described as the ultimate goal where the senses and mind find their final rest, and this state is equated with the Pure Brahman.