主要的义务规则是那些要求或禁止某些行为的规则。
The primary rules of obligation are those that require or forbid certain actions.
挑战是伪装的机会；以勇气拥抱它们。
The best way to ensure peace is to maintain a balance of power among the major states.
It is a far, far better thing that I do, than I have ever done; it is a far, far better rest that I go to than I have ever known.
最终，我们都只是别人和我们自己讲述的故事。
