采矿业的可持续性不是可选项，而是我们未来的必然选择。

I think it is often easier to make progress on mega-ambitious dreams. Since no one else is crazy enough to do it, you have little competition. In fact, there are so few people this crazy that I feel like I know them all by first name.

在年老之后，你会发现自己的双手能解决很多难题。一只手用来帮助自己，另一只用来帮助别人。