The only way to learn mathematics is to do mathematics.
爱是触及另一个人人格最内在核心的唯一方式。
The most dangerous risk is refusing to take any risks at all.
孔子说:“不要担心没有地位,要注意做人的立场;不要怕没人了解自己,要想法使自己容易得到理解。”
The historian walks a tightrope between fact and imagination.