对付一个不自由的世界，唯一的方法就是变得如此绝对自由，以至于你的存在本身就是一种反叛。

Freedom is not a gift but an achievement that must be won every day.

"The writer’s task is to make the invisible visible."

永远不要把一次失败和最终的失败混为一谈。

I never saw a problem that I did not attempt to solve by mechanical means.

人情面子象水一样可分高下，世界上的事象天上的云一样变化无常。

In mathematics, the art of proposing a question must be held of higher value than solving it.

We can’t ignore the economic role of coal, but we also can’t ignore its environmental impact.