世间的一切事情，都是由人的内心产生的。

我从来对平庸不感兴趣。

You can tell whether a man is clever by his answers. You can tell whether a man is wise by his questions.

自由的功用就是解放他人。

If you’re not willing to work hard, don’t expect success.

The poetry of the earth is never dead.

可持续性不是一种选择，而是唯一的出路。