Growth is painful but necessary.

The unknown is not to be feared but to be explored.

Courage in monetary policy is not the absence of fear but the judgment that something else is more important than fear.

我不让任何人夺走我的希望。

Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

夜晚是一首伟大的诗，但星星是它的文字。

意识的元素要通过实验手段来分离。

学习正确答案将帮助孩子完成学业，但学会如何学习是为一生做准备。

国家不过是一个阶级对另一个阶级进行压迫的机器。