Tri-tāpa-yatana. Adhyātmika, adhibhautika, adhidaivika. Three kinds of sufferings are always going on. Why you are running fan? Because suffering. There is heat. So where is no suffering? This is called adhidaivika, the scorching heat, scorching, I mean, severe cold. There must be always. We are suffering now due to scorching heat, and when the... We are thinking, "If it is become cooler..." And when it is cool, then also we suffering. Then we think, "If there is some heat." When there is winter, we are hankering after heat, and when there is summer, we are hankering after cooling.
So this is going on. We cannot be happy. First of all we must know that. There is no question of happiness here. We are simply hankering. "If, it would have been very nicely cool." And when it is cool, then you'll think, "If it had been nicely hot..." The same thing. Carvita-carvaṇānām. Carvita-carvaṇānām means chewing the chewed.