This is true: It’s hard to cheat an honest man.

自然和历史是地理知识的两个重要来源。

True leadership means having the courage to make unpopular decisions when they're the right ones.

正该来时，先生（老子）应时来到这世间；正该去时，先生顺时离开这世间。安于时势，顺应自然规律，哀乐就不能进入心中。