Swami Mukundananda talks about the one thing in life, which, when we give up, helps us attain peace of mind forever. We all want to have peace of mind, but why we don't have it all the time. That is because of the worldly desires of our mind. The problem with these desires is that if it's satiated, it may result in some temporary happiness, but soon you will find the need to have more, or the greed creeps in. In contrast, if these desires are not satisfied, it results in anger, which also means your mind is agitated and never really in peace. Therefore to have peace of mind forever, you need to give up the worldly desires which can never satisfy the soul.