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.

一个好的理论物理学家必须能够计算一切，但什么都不理解。

要理解一个人，你必须先理解他们的沉默。