学习数学的最好方法就是去做数学。

最重要的是拯救生命，不惜一切代价。

I am not an Athenian or a Greek，but a citizen of the world.

Man is free at the moment he wishes to be.

悲观导致软弱，乐观带来力量。

"You have to believe in yourself when no one else does—that's what makes you a champion."

有时候，沉默比语言更有力量。