But it doesn't have to be through philosophy, I think it can be through a wide range of other studies and other activities that you make a difference.

但不一定仅仅是通过哲学，通过学习其他的学科,通过其他的活动，你也一样可以发挥作用。

普林斯顿公开课 - 人性课程节选

Two, you can actually make a difference.

二，你们能带来改变。

哈佛公开课 - 幸福课课程节选