Lock up your libraries if you like; but there is no gate, no lock, no bolt that you can set upon the freedom of my mind.

写作是一种思考的方式，一种探索世界和自我的方式。

心是脆弱的，但它也是我们最强大的部分。

Leadership in forestry means having the courage to make decisions that will outlast your tenure.

China's rise will inevitably lead to conflict with the United States.

And when your stomach is empty and your mind is full,it's always hard to sleep.