Although people are looking Distress and happiness is different, because the feeling is not the same. But the two are the same. Distress is caused from carnality desire and undesired. They are three causes of suffering. And when they make it’s come true, they will be happiness. But if they can’t. They are suffer. So if you look at a wide angle. You will see that it was like the water cycle. If the water is distress, steam would be happiness. And the temperature is the action of yourself that it is water(suffering) or steam(happy).