The key to progress in science is persistence and an open mind.
The true measure of a mining company's success is its ability to leave a positive legacy for future generations.
Don't bother just to be better than your contemporaries or predecessors. Try to be better than yourself.
没有人会发动战争——或者说,理智的人不应该这样做——除非他首先清楚自己希望通过战争实现什么目标以及如何指挥战争。