According to Chapter 8, what distinguishes a meaningful human life from that of an animal?

Chapter 8 draws a sharp distinction between a meaningful human life and the existence of animals. The text argues that if a person's life is dedicated only to the four activities of eating, sleeping, fear, and mating, there is no fundamental difference between that person and a dog or a pig. The greatness of the human body, as Chapter 8 explains, lies in its potential for a higher purpose. The true duty and success of human birth is the attainment of the Supreme Self (Paramatman) and the realization of the Eternal. Simply having a sturdy body or breathing is not enough, as even dogs have strong bodies and a blacksmith's bellows breathes.