Philosophy is an ornament in prosperity, a refuge in adversity, and a provision in old age.

Concerning the gods, I cannot know either that they exist or that they do not exist, nor what form they might have, for there is much to prevent one's knowing: the obscurity of the subject and the shortness of man's life.

I don't really care what people say about me. I know who I am.

If you're not stubborn， you'll give up on experiments too soon. And if you're not flexible， you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.

Sustainability isn't just a trend—it's a responsibility we owe to future generations.

最深刻的发现往往来自于提出最简单的问题。

我们必须向自然学习如何高效利用资源。