Discovering those areas or reproducing them, doesn't imply the experience is not real. By the same token, we wouldn't say love, happiness and depression are not real.

发现这些区域或能重现这些体验，并不表明它们不是真实的。同样，我们不能说爱情，快乐或沮丧的感觉不是真实的。

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One study found that volunteer work enhanced all six aspects of well-being: happiness, life satisfaction, self-esteem, sense of control over life, physical health, and depression.

一份研究发现，志愿者性质的工作可以提升构成幸福的六大要素：快乐、对生活的满意度、自尊、对生活的掌控度、身体健康和抗抑郁能力。

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Studies show that regular physical activity increases happiness and self-esteem, reduces anxiety and stress, and can even lift symptoms of depression.

研究表明，经常锻炼身体会提高会提高幸福感和自尊感，会减少焦虑感和压力，甚至会解除抑郁症的症状。

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Levels of happiness are essentially static; and anxiety levels and depression levels, as we talked about in the first class have gone up significantly.

幸福水平几乎是静止的;,焦虑水平和抑郁水平，正如第一堂课讲到的，有明显的加深。

哈佛公开课 - 幸福课课程节选

Now happiness and unhappiness,or happiness and neurosis, psychosis and depression,are interconnected,of course.

幸福与忧愁，快乐与紧张，精神病与抑郁，都有很大的内在联系。

哈佛公开课 - 幸福课课程节选

The reason why we need positive psychology is to shift the pendulum from the 21:1 ratio that we have today: for every one study on depression or anxiety, we have 21 studies on-- sorry, for one study on happiness or wellbeing, we have 21 studies on depression and anxiety.

我们需要积极心理学是为了改变,现在的21比1这个比率：,每有一项关于抑郁或焦虑的研究，就有21项，对不起，应该是每有一项关于快乐或幸福的研究，就有21项关于抑郁或焦虑的研究。

哈佛公开课 - 幸福课课程节选

Overall then there is good evidence that several simple exercises increase happiness and decrease depression.

BBC: NEWS | Programmes | Happiness Formula | Staying happier for longer

And for those suffering from depression, I know how dark and endless that tunnel can feel, but if happiness seems impossible to find, please hold on to the possibility of hope, faint though it may be.

CNN: Robin Williams' daughter speaks out about depression