Martin Seligman

“Positive thinking is the notion that if you think good thoughts, things will work out well. Optimism is the feeling of thinking things will be well and be hopeful.”

“The best therapists can do with sadness, anger, and anxiety is to help patients live in the more comfortable part of their set range.”

“Psychology is much bigger than just medicine, or fixing unhealthy things. It's about education, work, marriage - it's even about sports. What I want to do is see psychologists working to help people build strengths in all these domains.”

“On the relationship side, if you teach people to respond actively and constructively when someone they care about has a victory, it increases love and friendship and decreases the probability of depression.”

“I'm trying to broaden the scope of positive psychology well beyond the smiley face. Happiness is just one-fifth of what human beings choose to do.”

“Positive emotion alienated from the exercise of character leads to emptiness, to inauthenticity, to depression, and, as we age, to the gnawing realization that we are fidgeting until we die.”

“High taxes on guns and strong restrictions on their availability are the only realistic hope for avoiding many more Sandy Hooks.”

“One of my signature strengths is the love of learning, and by teaching, I have built it into the fabric of my life. I try to do some of it every day.”

“Sexual performance problems, such as impotence and frigidity, are 70 to 90 percent changeable. But a homosexual who wants to be a heterosexual - that's close to unchangeable. And a transsexual - say a man who believes he's really a woman in a man's body - is completely unchangeable; you'd have to change the body to conform to the psyche.”

“I think we pursue positive relationships whether or not they bring us engagement or happiness.”

“The word 'happiness' always bothered me, partly because it was scientifically unwieldy and meant a lot of different things to different people, and also because it's subjective.”

“What humans want is not just happiness. They want justice; they want meaning.”

“The good life consists in deriving happiness by using your signature strengths every day in the main realms of living. The meaningful life adds one more component: using these same strengths to forward knowledge, power or goodness.”

“I'm all for past influences; the question is whether they are deterministic. Freud and the behaviorists argue that what we are at any given moment is billiard balls whose past determines our future course. That doesn't take into account that we are forever generating internal representations of positive futures and choosing among them.”

“The goal of a life free of dysphoria is a snare and a delusion. A better goal is of good commerce with the world. Authentic happiness, astonishingly, can occur even in the presence of authentic sadness.”

“I have spent most of my life working with mental illness. I have been president of the world's largest association of mental-illness workers, and I am all for more funding for mental-health care and research - but not in the vain hope that it will curb violence.”

“Well-being cannot exist just in your own head. Well-being is a combination of feeling good as well as actually having meaning, good relationships and accomplishment.”

“I have never worked on interrogation; I have never seen an interrogation, and I have only a passing knowledge of the literature on interrogation. With that qualification, my opinion is that the point of interrogation is to get at the truth, not to get at what the interrogator wants to hear.”

“I think you can be depressed and flourish, I think you can have cancer and flourish, I think you can be divorced and flourish. When we believed that happiness was only smiling and good mood, that wasn't very good for people like me, people in the lower half of positive affectivity.”

“The belief that we can rely on shortcuts to happiness, joy, rapture, comfort, and ecstasy, rather than be entitled to these feelings by the exercise of personal strengths and virtues, leads to legions of people who, in the middle of great wealth, are starving spiritually.”

“Suppose you could be hooked up to a hypothetical 'experience machine' that, for the rest of your life, would stimulate your brain and give you any positive feelings you desire. Most people to whom I offer this imaginary choice refuse the machine. It is not just positive feelings we want: we want to be entitled to our positive feelings.”