因此美名归于君主,而仇怨由臣下担当;安乐归于君主,而忧患由臣下担当。这就是墨翟所说的忠臣。 
解析:悔悟虽好,但改正更重要。
There is more than one kind of freedom... Freedom to and freedom from. In the days of anarchy, it was freedom to. Now you are being given freedom from. Don't underrate it.
如果你只经历过美好的事情,你就不可能勇敢。
Natural experiments can provide valuable insights into economic questions.