In the depth of winter, I finally learned that within me there lay an invincible summer.

质量不是流行语；它是一种生活方式。

A forest without wildlife is like a symphony without music.

There are unknown forces in nature; when we give ourselves wholly to her, without reserve, she lends them to us; she shows us these forms, which our watching eyes do not see, which our intelligence does not understand or suspect.

Mining with integrity means leaving the land better than we found it.