最终，我们记住的不是敌人的话语，而是朋友的沉默。
In the end, we will remember not the words of our enemies, but the silence of our friends.
"The past is always present in our lives, whether we acknowledge it or not."
"Everything is a learning process: any time you fall down, it's just teaching you to stand up the next time."
The deeper you go into mathematics, the more you realize how much remains unknown.
边界是地球脸上的伤疤，是暴力和分裂的标记。