Acharya Prashant explains that peace of mind should never be dependent on external circumstances or the behavior of other people. If one's peace relies on others fulfilling specific expectations, it is not true peace but a transactional arrangement rooted in desire. Worldly things are inherently dependent on other worldly factors, but true peace is valuable precisely because it transcends the material world. When we link our internal state to gains, losses, or the treatment we receive from others, we reduce peace to a mere commodity that can be traded or lost. One must value peace above all else and refuse to sell it for any worldly attraction or profit.