The test of our progress is not whether we add more to the abundance of those who have much; it is whether we provide enough for those who have too little.

人类留下的痕迹往往是伤痕。

无畏不是没有恐惧。不是完全不害怕。无畏是有恐惧。无畏是有怀疑。很多怀疑。无畏是尽管有这些，依然每天生活。

技术可以彻底改变矿业，但前提是我们有勇气接受它。

I constantly see people rise in life who are not the smartest, sometimes not even the most diligent, but they are learning machines. They go to bed every night a little wiser than they were when they got up.