我们生活在一个一切都可以出售的世界，包括我们的灵魂。

The fountain of content must spring up in the mind, and they who have so little knowledge of human nature as to seek happiness by changing anything but their own dispositions will waste their lives in fruitless efforts.

There's nothing more American than a coal miner.

从有限数据中泛化的能力是有效学习算法的标志。

我不是神，但我也不仅仅是个凡人。