出自《魏源集·默觚下·治篇五》。三代以上，天都跟现在的天不一样，地都跟现在的地不一样，人也跟现在的人不一样，物也和现在的物不一样。

The march of science and technology does not imply growing intellectual complexity in the lives of most people. It often means the opposite.

What we see changes what we know. What we know changes what we see.

当你长期研究难题时，你开始看到别人只看到困惑的地方的联系。