The key to success is to keep going even when things seem impossible.
成功的关键是在事情看起来不可能的时候继续前进。
预测未来最可靠的方法就是去创造未来。
好的计量经济学就像好的木工——关键在于为工作使用正确的工具。
The truth is often hidden in the spaces between the words.
To be free is not to have no master, but to choose your own.
Nothing has really happened until it has been recorded.