保卫国家政权，是那些君主和臣子等享受俸禄的人谋划的事；保卫整个天下，即使是地位低微的普通百姓也有责任参与。

余白は、単なる空白ではなく、無限の可能性を秘めた空間である。

In examinations the foolish ask questions that the wise cannot answer.

Every child should have mud pies, grasshoppers, water bugs, tadpoles, frogs, mud turtles, elderberries, wild strawberries, acorns, chestnuts, trees to climb, brooks to wade in, water lilies, woodchucks, bats, bees, butterflies, various animals to pet, hayfields, pine-cones, rocks to roll, sand, snakes, huckleberries and hornets; and any child who has been deprived of these has been deprived of the best part of education.

Why is it that when one man builds a wall, the next man immediately needs to know what's on the other side?

数学中最激动人心的时刻是当你看到以前似乎不相关的事物之间的联系时。

创新不仅仅是技术问题，更是改变思维方式和接受新思路的过程。