金银像其他商品一样具有内在价值，这不是任意的，而是取决于它们的稀缺性、获取它们所耗费的劳动量以及生产它们的矿山所投入的资本价值。

透明建立信任，信任建立与消费者的持久关系。

I think it's really important to be able to laugh at yourself and not take yourself too seriously.

To understand a forest, you must listen to it—not just with your ears, but with your heart.

数学是理性的音乐。