Acharya Prashant explains that mortality or transience is not a concept to be contemplated occasionally but a reality visible in every moment. He points out that everything in the world, from a growing child to the passing of a day, is in a state of constant flux. He emphasizes that if the world is changing, the individual is also changing every moment, which leaves no room for ego. Ego thrives on the illusion of permanence, but a close observation of life reveals that we are merely a collection of influences from nature, time, and environment. He uses various mundane examples like the ticking of a clock, the act of breathing, and even hair falling out during combing to illustrate that nothing is stable. By recognizing this constant change, one realizes that the self or ego is hollow and lacks any real, lasting existence. True existence belongs only to the eternal soul, while the ego is transient and empty.