Acharya Prashant explains that the human body is a product of nature, similar to plants and animals, and follows a natural life cycle. However, humans are unique because of the ego, which seeks liberation through consciousness. He clarifies that the 'I' or ego is not the soul but is referred to as the individual soul in the Bhagavad Gita. This ego is eternal like nature and remains restless because it has forgotten its true identity as the soul. In its confusion, the ego seeks immortality and peace through worldly means like long life, fame, and legacy, which are ultimately futile attempts to find the soul's eternal nature.