最终，我们会记住的不是我们的敌人的话语，而是我们朋友的沉默。
In the end， we will remember not the words of our enemies， but the silence of our friends.
War is an ugly thing， but not the ugliest of things: the decayed and degraded state of moral and patriotic feeling which thinks that nothing is worth a war， is much worse.
The beauty of a mathematical idea is that it can be shared and understood across cultures and time.
If liberty means anything at all, it means the right to tell people what they do not want to hear.