Success is not final, failure is not fatal: it is the courage to continue that counts.

Democracy must be born anew every generation, and education is its midwife.

We are all obsessed with the idea of the frontier, but it's a frontier that keeps receding.

You don't love because: you love despite; not for the virtues, but despite the faults.

一个人能做的最好的事情就是帮助另一个人知道更多。

现实不是我们所看到的，而是我们所思考的。

一个人最危险的敌人是他自己的口舌。