What does Chapter 19 identify as the ultimate duty and goal of human birth?

The teachings in Chapter 19 state that the fulfillment of the soul and the primary duty of a human birth is the attainment of several key spiritual states. These are listed as eternity, fearlessness, liberation, independence, and the ultimate attainment of the Supreme Self. To achieve this, the chapter outlines a clear path: one must cultivate detachment by understanding the transient nature of the world. This detachment leads to the attainment of true knowledge, and the text explicitly states that there can be no liberation without this knowledge. This process represents the ultimate purpose of our existence.