But although my duty is clear, it is in some way painful.

VOA: special.2009.10.08

When you lead the meditation, I think kneeling is fine, but for me it's really painful, not everybody can do that.

当进行冥想时，我觉得跪地可以接受，但确实感到疼痛，不是人人都可以坚持。

普林斯顿公开课 - 人性课程节选

We'll talk about what is the right time and how do you find the right time, how do you find the balance between thinking about painful emotions and when does it slide to rumination, which is not always helpful.

我们会谈到什么是合适的时候,如何找到合适的时候，以及如何在,思考痛苦情绪,和让痛苦情绪滑入沉思到平衡，沉思并非总有帮助。

哈佛公开课 - 幸福课课程节选