But this cheap-thrill version, this sort of ease definition, the feel-good definition of happiness is an empty promise. Unless we get wiser as to how to carry the difficulties of life in a way that's self-compassionate and empowering, we can create this kind of world in which we'd rather sort of plug into the matrix with whatever pills or escapist tendencies we can think of instead of walking through a process of living that's going to include loss. It's going to include limitations on function. We need to learn and teach our children how to do that.

Could we take anxiety to be something that may be of importance, may even be meaningful? And it says something about your history, and could we learn to sort of hold it in a way that's more compassionate, to sort of bring the frightened part of you close and treat it with some dignity, and keep focused instead on what kind of life you want to live connected to what kind of meaning and purpose. That's going to be a quicker, more self-compassionate and more certain journey forward inside things like panic disorder.

The mental cognitive processes that we're targeting are ones that narrow human beings' repertoire and make it harder for them to learn to be more flexible, to take advantage of the opportunities in front of them. We can have something to help with in areas like child development or organizations and schools, or maybe even how peoples interact with each other, one to the other. We've taken the work into things like prejudice and stigma, because if we can't solve that we have planes flying into buildings. So it applies broadly because anywhere that a human mind goes these processes go.

ACT psychology is a psychology of the normal. A lot of the psychologies that are out there are built on the psychology of the abnormal. We have all these syndromal boxes that we can put people in and so forth. The actual evidence on syndromes is not very good. There's no specific biological marker for any of the things that you see talked about in the media. Even things like schizophrenia - there's no specific and sensitive biological markers for these things. There may be some abnormal processes involved, but vastly more of human suffering comes from normal processes that run away from us.

I kind of look at what's on the T-shirts and I see another solution, which also worries me. I see "Just do it." "No fear." - this kind of suppressive response to the treacle that the culture tries to define for us as a meaningful life also blows up on you. "No fear" is not something that you should put on your shirt. How about "I can hold my fear and still connect with you"? Put that on your shirt. "It's okay to be me, with all of my history." Put that on your shirt.

Antidepressant medications, you still have some depressive thoughts. Antipsychotic medications, you still have some psychotic symptoms for the vast majority of the people taking them. But it gives them a little separation, and it doesn't control his behavior as much when you have a sad feeling, difficult thought, an odd perceptual experience. We can teach people those exact skills in therapy, you get longer-term benefits and without the side effects. So don't be sold just because a commercial interest wants to sell you things.

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.