"War is a dark thing, but sometimes it is the only light we have."
战争是黑暗的，但有时它是我们唯一的光。
True understanding comes from grasping the inner structural relationships of a problem.
Reality is always richer than any idea we can have of it.
The principle goal of education in the schools should be creating men and women who are capable of doing new things, not simply repeating what other generations have done.
家庭是一个生产人力资本的小工厂。