追求数学知识是一场永无止境的冒险。
辩论的时间已经结束;行动的时间就是现在。
最个人的东西也是最普遍的。
The more one loves, the less one judges.
There are two freedoms - the false, where a man is free to do what he likes; the true, where he is free to do what he ought.