数学的精髓在于它的自由。
The essence of mathematics lies in its freedom.
世界上最伟大的教育就是观察大师们工作。
The final reward of the dead is to live on in the memory of the living.
The more we study the more we discover our ignorance.
我们都是成功祖先的后代;失败者没有留下后代。