The best quarries leave no scars, only responsible transitions.
设定新目标或做新梦想永远不会太晚。
真相很少纯粹，也绝不简单。
最深刻的真理往往最简单。
有时保持理智的唯一方法就是偶尔发疯。
The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.