密码学是关于在存在对手的情况下进行通信的。

智慧总是在它不再有任何用处时才降临到我们身上。

Leadership is solving problems. The day soldiers stop bringing you their problems is the day you have stopped leading them.

The art of living is to know when to hold fast and when to let go.

法律是通过社会机构执行的规则系统，用以管理行为。