What does Chapter 19 say is the ultimate duty of human birth, and what is required to achieve it?

The teachings in Chapter 19 state that the fulfillment of the soul and the primary duty of human birth is the attainment of "Eternity, fearlessness, liberation, independence, and the attainment of the Supreme Self." The text outlines a clear progression for this journey, explaining that there can be no liberation without knowledge. Furthermore, knowledge cannot be attained without detachment. This sense of detachment only sparks when the mind begins to perceive the world as transient, which is the crucial first step on the path to ultimate freedom.