Freedom is not merely the opportunity to do as one pleases; neither is it merely the opportunity to choose between set alternatives. Freedom is, first of all, the chance to formulate the available choices, to argue over them—and then, the opportunity to choose.

"History is not just facts and dates; it’s the lives of people who lived them."

我对“风格”这个词非常怀疑。当人们不理解事物时，就用这个词来分类。

把每一天当作生命的最后一天来活。

发现的喜悦是推动数学家前进的动力。