Coal built the modern world, and it's our responsibility to ensure its legacy is managed with wisdom.

Quality is not something you can add on to a product or service. It must be built in from the beginning.

学习古人但不拘泥于古人，效法古人但不抄袭古人。

我不觉得有义务相信，那位赋予我们感官、理性和智力的上帝，会希望我们放弃使用它们。

最好的投资是那些能够建立伟大公司的人，而不仅仅是想法本身。