马克思的功绩在于他忽然在社会思想史上产生了一个质的变化。他解释历史，理解其动力，预测未来，但除了预测之外，他还表达了一个革命性的概念：世界不仅必须被解释，还必须被改变。

The power of a computational model is not just in its ability to compute, but in its ability to generalize from specific instances.

If you're walking down the right path and you're willing to keep walking, eventually you'll make progress.

写作是为沉默者发声，让不可见的事物显现。

文字的力量可以改变世界。