"In every war, there are two truths: the truth of the victors and the truth of the vanquished."

The cognitive map is not a picture or a model in the head, but a dynamic, changing representation of the environment.

I must study politics and war that my sons may have liberty to study mathematics and philosophy.

如果你买进时股价过高，那么就算是买了全世界最好的公司的股票，也会变成最糟糕的投资。同理，如果你低价买进一只股票，哪怕公司基本面平平，也可能会成为你投资组合中的明星。

我们不仅生活在思想的世界中，而且也生活在物质的世界中。