只要世界还存在，就会有错误，如果没有人反叛，这些错误将永远存在下去。
As long as the world shall last there will be wrongs, and if no man rebelled, those wrongs would last forever.
数学证明的美在于它的简洁性和必然性。
We must be free not because we claim freedom, but because we practice it.
最终，我们记住的不是敌人的话语，而是朋友的沉默。