Coal is not just a commodity, it's a commitment to America's future.

Have you given any thought to your future？

I write to understand the complexity of human experience.

无论大自然为人类准备了什么，无论多么不愉快，人类都必须接受，因为无知从来都不比知识更好。

"The path to greatness is not always easy, but it is always worth it."

我不害怕风暴，因为我正在学习如何驾驶我的船。

The true test of a mathematical idea is its ability to inspire further questions.