科学发现的真正本质不在于它提供的答案，而在于它提出的新问题。

矿业必须以可持续发展为核心进化，否则我们可能被淘汰。

The natural effort of every individual to better his own condition， when suffered to exert itself with freedom and security， is so powerful a principle that it is alone， and without any assistance， not only capable of carrying on the society to wealth and prosperity but of surmounting a hundred impertinent obstructions with which the folly of human laws too often encumbers its operations.

Common sense is not so common.