The young do not know enough to be prudent, and therefore they attempt the impossible – and achieve it, generation after generation.

The best time to plant a tree was 20 years ago; the second best time is now.

煤炭不仅仅是一种商品，它是对美国未来的承诺。

真相很少纯粹，也绝不简单。

"We don't see things as they are, we see them as we are."

写作是与世界联系的一种方式。