What is the philosophical argument presented in Chapter 8 regarding the true purpose of human life versus animal existence?

Chapter 8 of the Sai Satcharitra presents a profound philosophical argument about the purpose of human life. It posits that if life is reduced to the four activities of eating, sleeping, fear, and mating, then there is no difference between a human and an animal like a dog or pig. The text explicitly questions what greatness the human body holds if it is used for the same purposes. As explained in Chapter 8, the true duty and success of a human birth lie in the attainment of the Supreme Self (Paramatman). Without this higher goal, the chapter argues, human birth is essentially useless and wasted.