Acharya Prashant explains that duality (Dvaita) is the misconception that the external world and the self (Atman) exist on the same level or dimension. He clarifies that while the senses perceive the world as real, it does not belong to the same category as the Atman. Duality arises when one fails to see this dimensional difference and treats the world as equivalent to the self. Non-duality (Advaita), on the other hand, signifies that the Atman is unique, incomparable, and unassociated. It is the realization that the self is not a material object and cannot be paired with the world. The speaker emphasizes that saying 'Atman and the world' is a fundamental error because the Atman is complete in itself and cannot be joined with anything else. He further elaborates that the feeling of being a 'worldly person' or a 'consumer' of the world is the root of duality, leading to a sense of lack and constant pursuit. Advaita teaches that the relationship between the self and the world should be that of a witness (Drashta) and the witnessed (Drishya), rather than a consumer and the consumed. He clarifies that Advaita does not deny the existence of the world but categorizes it as 'Mithya'—something that appears to exist but lacks ultimate substance (Nissar). The world is relative and transient, while the Truth is absolute and incomparable. One must acknowledge the world's functional reality without defining oneself through it. In practical terms, Acharya Prashant suggests that one can engage with the world while remaining anchored in inner peace. He uses the analogy of a child watching a movie while sitting securely in its mother's lap; the child sees the entire world on the screen but never lets go of the mother. Similarly, one should perform worldly duties and solve problems, like searching for a lost slipper, without losing their internal state of peace. Peace should be unconditional and independent of external circumstances. He concludes that the mind is merely a collection of assumptions, and by changing these assumptions—specifically the idea that peace depends on favorable conditions—one can remain tranquil in every situation.