True leadership is about making tough decisions for the greater good.

The coal industry must evolve or risk becoming obsolete. Adaptation is the key to survival.

对做好自己的事感到满足，不必理会别人如何议论你。

历史首先是那个遗产的创造和记录；进步是其日益增长的丰富性、保存、传递和使用。

"A story has no beginning or end: arbitrarily one chooses that moment of experience from which to look back or from which to look ahead."

一个好农民不过是一个有腐殖质意识的巧手人。