This is the story of the empowerment of the poet, his empowerment through his experience of a terrible loss.

这讲述的是诗人的力量，他因一次痛苦的失去而获得的力量。

耶鲁公开课 - 弥尔顿课程节选

Once again,they don't spontaneously emerge once the painful experiences go away.

再说一次，幸福不会自动出现,并不是没有痛苦就能感到幸福。

哈佛公开课 - 幸福课课程节选