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A man's errors are his portals of discovery.

The very existence of libraries affords the best evidence that we may yet have hope for the future of man.

It's through curiosity and looking at opportunities in new ways that we've always mapped our path.

I don't compete with anyone but myself.

生活不是等待暴風雨過去，而是學會在雨中跳舞。

No one is an artist unless he carries his picture in his head before painting it.

Innovation in coal mining isn't just about extraction—it's about doing it smarter, safer, and with greater respect for the environment.