某个命题可以从某一组公理通过某一规则系统推导出来，这一事实本身并不使其为真。

不过是君主不把它［爱人利人］用在政事上，士大夫也不把它付诸行动罢了。 

所有行为都是由某种形式的驱力减少所驱动的。

The pursuit of happiness is not about feeling good all the time, but about striving toward meaningful goals.

"Literature should disturb the comfortable and comfort the disturbed."

The key is to set realistic customer expectations, and then not to just meet them, but to exceed them — preferably in unexpected and helpful ways.