我们从这样的假设开始：任何学科都可以以某种智力上诚实的形式有效地教给处于任何发展阶段的任何孩子。

"The ordinary is just the extraordinary that’s become familiar."

A society grows great when old men plant trees whose shade they know they shall never sit in.

Faith in a holy cause is to a considerable extent a substitute for the lost faith in ourselves.

处理一个不自由的世界的唯一方法是变得如此绝对自由，以至于你的存在本身就是一种反叛。