Acharya Prashant explains that the ego is the root of unhappiness and worldly existence, as described in the Ashtavakra Gita. He clarifies that while the ego is fundamentally supportless and rootless, it continues to nourish worldly life because individuals assume it has a solid foundation. This is compared to a dream where everything appears real until one wakes up. People invest in and decorate their personal worlds because they believe the ego's foundation is real, even though it is non-existent. The ego is defined as one's sense of self, which often manifests as an internal buzz or chaos that makes itself feel indispensable and distracts from reality. The speaker highlights that the ego's survival depends on its inability to self-reflect. It is the ego's blindness and lack of self-knowledge that allow it to persist; if it truly knew itself, it would collapse. Acharya Prashant notes that as one grows in self-knowledge, the ego nears its end. He addresses the contradiction where the ego perceives itself as strong while being inherently weak. This delusion prevents the ego from accessing the truth, as it refuses to admit its powerlessness. He concludes that living strictly by facts, without the interference of assumptions, is in itself a path to liberation.