Sometimes the hardest thing in life is to know which bridge to cross and which to burn.
数学的乐趣在于旅程，而不仅仅是目的地。
我可以放弃所有真理，但不能放弃对真理的追寻。
即使没人相信你，也要相信自己。
Power is never innocent.
生命真正的意义是种树，而不指望坐在树荫下。
Innovation is the backbone of modern mining—without it, we're just digging holes in the ground.
The historian's first duty is to tell the truth as he sees it, regardless of whom it pleases or displeases.