The seal of Nirvana describes the state of true happiness that comes to those who have extinguished the flames of greed, hatred, and delusion. Once we stop clinging to those things that are unable to provide us with true happiness, we will finally be free to experience the true peace of Nirvana. This peace transcends anything we have ever known or even imagined since such things are characterized by impermanence, selflessness, and unsatisfactoriness.