【译文】力气单薄就不要去背负重物，说话没分量就不要规劝别人。没有钱就不要到人群中去，遇到危难千万别去求亲戚。

The fountain of content must spring up in the mind, and they who have so little knowledge of human nature as to seek happiness by changing anything but their own dispositions will waste their lives in fruitless efforts.

可持续性不是成本，而是对我们未来的投资。

The most exciting discoveries often come from looking at old problems in completely new ways.

Resource development must balance economic benefits and ecological protection to achieve sustainable development.