Acharya Prashant explains the significance of the Ishavasya Upanishad's verse which suggests that a person should desire to live for a hundred years while performing their duties. He clarifies that the goal of living a long life is not for sensory enjoyment but to provide oneself with a longer opportunity to achieve liberation. For most people, overcoming the ego and the attractions of nature is a difficult task that requires time; hence, a long life is a valuable resource for spiritual progress. The hundred-year lifespan is a means to an end, where the end is liberation from the egoic self.