Acharya Prashant explains that the ego is a disease and a form of slavery that has no positive impact on one's life. He describes the ego as a state of lifelessness and the primary source of all forms of fear. Because the ego is a borrowed sense of self derived from the opinions and acceptance of others, it leaves an individual at the mercy of their audience. This dependency creates constant nervousness and the fear that what has been given by others can also be taken away. He emphasizes that fear arises only because one's self-image is internalized from external sources rather than being authentic.