语言是存在的家。

历史是对于未来最好的老师。历史书中的答案价值万金。

Children totally accept — and crave — family rules. “In our family we have a rule for X” is the only excuse a parent needs for setting a family policy. In fact， “I have a rule for X” is the only excuse you need for your own personal policies.

唯一真正的监狱是我们为自己建造的监狱。

我是那些认为科学具有巨大美的人之一。