The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.

估计问题的性质不同。在这里，我们不关心检验特定的假设，而是关心估计参数的值。

The sea has never been friendly to man. At most it has been the accomplice of human restlessness.

"The power of a story is that it can change the way you see the world."

搭便车的时候，你得看上去像一个你自己也愿意接上车的人。

有时候写作最难的部分就是开始。