The value of a commodity, or the quantity of any other commodity for which it will exchange, depends on the relative quantity of labor which is necessary for its production, and not on the greater or less compensation which is paid for that labor.

In contemplation, we find the truth.

行为法则与物理学法则一样精确。

不管战略多美妙，偶尔看看结果如何很重要。

我相信积极的力量。

最可持续的竞争优势是持续学习的文化。