Acharya Prashant explains that mindfulness must be purposeful rather than a random or mechanical practice. He argues that the human mind is already burdened with excessive information and sensory objects, so one should not admit anything into their consciousness unless it serves a clear purpose or provides insight. Using the example of looking into a rabbit's eyes, he suggests that such an observation should lead to self-insight and an understanding of one's own longing. He cautions that being mindful of trivial or random activities, such as counting steps or breaths without a valid reason, only serves to dull the mind and provide a temporary, superficial relief from suffering without addressing the root cause.