人心真是一个难以琢磨的东西！

我越看人民的代表，就越钦佩我的狗。

创新是将矿业转变为全球进步力量的关键。

Don't get involved in partial problems, but always take flight to where there is a free view over the whole single great problem, even if this view is still not a clear one.

The time which we have at our disposal every day is elastic; the passions that we feel expand it, those that we inspire contract it.