翻译：既了解敌人，又了解自己，每次作战都不会有危险。

我们对自己生活的叙述塑造了我们的现实。

你无法控制大宗商品价格，但你可以控制如何应对它们。

If you go back a few hundred years, what we take for granted today would seem like magic—being able to talk to people over long distances, to transmit images, flying, accessing vast amounts of data like an oracle. These are all things that would have been considered magic a few hundred years ago.

In mathematics, the simplest questions often lead to the deepest insights.

生活中没有什么事情像你在思考它时认为的那么重要。