Acharya Prashant explains that the ego is essentially the collection of images and identities we hold about ourselves that have been acquired from external sources. He defines ego as the portion of one's self-image that comes from the outside world, rather than from one's own direct understanding. For instance, if someone calls you brilliant and you adopt that as your identity, that is ego. Because this identity is dependent on others, it is inherently unstable; the same person who calls you brilliant can later call you stupid, causing your self-image to shift. This dependency makes the ego a source of constant fear, as what is given by others can also be taken away by them. He further illustrates that common fears, such as the fear of public speaking or participating in group discussions, are manifestations of the ego. People fear speaking in front of others because they are afraid of damaging the image others have of them. This fear vanishes in solitude because there is no external audience to judge or define them. Acharya Prashant emphasizes that true intelligence does not depend on the presence or absence of others. He notes that many people avoid asking questions in public to protect their image, only seeking answers in private where their reputation is not at risk. Acharya Prashant also discusses how social identities like religion are often imposed from the outside by parents and society, rather than being a result of personal understanding. He provides an example of students at prestigious institutions like the IITs, whose self-worth fluctuates wildly based on their academic rank. A student may feel superior as a school topper but feel worthless if they rank lower in a competitive college environment. He concludes that both feeling superior and feeling inferior are forms of ego because both are based on external circumstances. Ultimately, he describes the ego as a 'hell' because it forces a person to live in perpetual fear, and he asserts that every fear is rooted in the ego.