Mining with integrity means leaving the land better than we found it.
诚信采矿意味着让土地比我们发现时更好。
The real tragedy of the poor is that they can do nothing but wait for the rich to give them something.
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
Do not use power to suppress opinions you think pernicious, for if you do the opinions will suppress you.
预测未来的最好方法就是创造未来。
可持续发展不再是可选项，而是我们对后代的责任。