This is the secret of happiness.

这就是幸福的秘诀。

youdao

You have found the secret of happiness.

你已经找到了幸福的秘密。

youdao

Confucius can teach us the secret of happiness; to find the peace within.

孔夫子可以教给我们幸福的秘诀：寻找自身以内的安宁。

youdao

The one secret of success, happiness and a perfect love life.

成功，快乐，完美爱情的唯一秘诀。

哈佛公开课 - 幸福课课程节选

How to gain, how to keep, how to recover happiness, is in fact for most men at all times the secret motive of all they do, and all they are willing to endure."

如何获得，如何保持，如何重获快乐，是多数人时刻怀有的秘密动机，是他们愿意忍受一切的目的“

哈佛公开课 - 幸福课课程节选

See also: Is happiness the secret of success?

CNN: Why 'follow your passion' is bad advice

All of the countries above the US have a lower corporate income tax rate than the US. Thus the secret to happiness is to have a lower corporate income tax rate.

FORBES: World Happiness Report: Even Jeff Sachs and Richard Layard Don't Really Believe It