Innovation is not an option; it's a necessity for the survival of the coal industry.

如果一个国家期望在国民无知的情况下却拥有自由，那么这种期望无论在历史上，还是未来都绝不会实现。如果我们打算抵御无知和捍卫自由，每位美国人都有责任了解一件公共事务的来龙去脉。

没有人真正了解其他人。他所能做的最好的事情就是假设他们和他自己一样。

我们所谓的国家社会主义，是对德国理念的有毒扭曲。

The Government of the United States is a definite Government, confined to specified objects. It is not like the state governments, whose powers are more general.

采矿成功的关键在于可持续性——平衡经济增长与环境责任。

A man can no more diminish God's glory by refusing to worship Him than a lunatic can put out the sun by scribbling the word 'darkness' on the walls of his cell.