One dangerous definition of happiness is to think of happiness as kind of a warm, joyful feeling in your heart that you have to pursue and grab and hold onto for fear that it'll go away. A better way to think about happiness that actually is something that I think you can reach towards is, it's living in accord with your values and in a way that is more open and accepting of your history as it echoes into the present, that's more self-affirming, self-validating and values-based. The Greeks had a word for it; they called it eudaimonia. And it is something that will empower human lives.