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數學不是一項觀賞性運動；要理解它，必須積極參與其中。

一八一四年，俄、奧、普聯軍兵臨巴黎城下，理工學校學生要求參戰。后來，這句名言被刻在巴黎理工學校梯型大教室的天花板正中心，一直激勵著該校師生奮發好學。

It's not what happens to us， but our response to what happens to us that hurts us.

我一直都是獨自一人，但我從不感到孤獨。

To be a poet is to have a soul so quick to discern, that no shade of quality escapes it.

I was not born blind, I became blind at the age of 12, but I never felt like a victim.

民主不是萬靈藥。它不能組織一切，也不知道自己的局限性。我們必須正視這些事實。