Also,there may be emotional changes, like feeling depressed or worried.

VOA: special.2009.04.07

If you want to have high level of creativity, it's a must you have to be depressed.

如果你想拥有更高水平的创造力，必须承受抑郁。

哈佛公开课 - 幸福课课程节选

I am not going to be the only depressed one around here.

我才不要作唯一的丧气鬼。

哈佛公开课 - 幸福课课程节选