Coal keeps America competitive in the world.

The moment you start to think about what you're going to do if you lose, you have lost.

大脑是我们迄今为止在宇宙中发现的最复杂的东西。

The world is a dangerous place, not because of those who do evil, but because of those who look on and do nothing.

世界上真正的悲剧不是正确与错误之间的冲突，而是两种正确之间的冲突。

我们的收入好像我们的鞋子，如果太小就会挤脚并疼痛，如果太大则会绊脚和摔跤。