Dr. Rozin, who studies other human emotions and likes and dislikes (“I am the father of disgust in psychology,” he says) thinks that we’re in it for the pain.

罗津博士专门研究人类的喜爱厌恶之情以及其他感情（“我是反感心理学的鼻祖，”他说），他认为人类需要辣椒是为了寻求痛苦。

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"The fact that positive emotions in one day predicted survival is pretty amazing," says Sonja Lyubomirsky, a psychology professor at the University of California, Riverside.

“事实上，一天内积极的情绪对生存率的预测令人惊异，”加利福尼亚大学心理学教授Sonja Lyubomirsky说。

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An Australian expert in psychology from the University of New South Wales, who has been researching human emotions, has found that being grumpy makes people think more lucidly.

来自澳洲新南威尔斯大学，研究人类情绪的心理学专家发现暴躁的脾气可以帮助人们更清晰地思考事情。

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For example, they help us think beyond what we are thinking right now, broaden our thinking; they help us build relationships; they help us build capacities-- remember one of the key concepts of this course is the positive emotions, positive psychology as a field as a whole, is about building capacities.

比如它们有助我们超越,现在的思考范畴，拓展我们的思想;,有助我们建立人际关系;,帮助我们建立能力-,这门课的一个主要概念,就是积极情绪，积极心理学，就是要建立能力。

哈佛公开课 - 幸福课课程节选

As I tried to make sense of the psychology of these "self-transcendent emotions, " I began to realize that religions are often quite skilled at producing such feelings.

CNN: Why we love to lose ourselves in religion

Creative people in the arts must develop a deep sensitivity to their surroundings -- colors, sounds, and emotions, says Mihaly Csikszentmihalyi, professor of psychology and management at Claremont Graduate University in Claremont, California.

CNN: Experts ponder link between creativity, mood disorders

Dr David Mrazek, chair of the Mayo Clinic's Department of Psychiatry and Psychology, said that the research emphasised just how powerful human emotions can be.

BBC: Parenting link to asthma