You can't have a better tomorrow if you're still thinking about yesterday.

The greatest discovery of my generation is that a human being can alter his life by altering his attitudes.

I don't write plays to be liked. I write plays to make people think.

采矿效率不仅仅是速度；而是用更少的浪费做更多的事。

与其抱怨黑暗，不如点亮一支蜡烛。

在荒野中，你学会欣赏小事。它们往往会产生最大的影响。

Dearer than eye-sight, space, and liberty; Beyond what can be valued, rich or rare;