你放弃的那一刻就是你失败的那一刻。
The world is made of words, and if you know the words the world is made of, you can make of it whatever you wish.
所有没有杀掉我的就只会令我更顽强!
The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.