道理明白了，文辞就能表达清楚；文辞表达清楚了，道理也就明白了。

The only way to deal with the world is to write about it.

A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty.

科学的历史是其对象生产的历史。

I believe in hard work and persistence.

我足够了。我一直都足够了。我将永远足够了。