真正的领导力意味着做出今天艰难的决定，这些决定将在几十年后获得回报。
True leadership means making tough decisions today that will pay off decades from now.
The state, therefore, has not existed from all eternity. There have been societies that did without it, that had no notion of the state or state power. At a certain stage of economic development, which was necessarily bound up with the split of society into classes, the state became a necessity.
科学的整个历史是一个渐进的自我实现的历程，重大的事件不会任意发生，但是他们反映了一种潜在的次序，而不会简单地由灵感产生。
The only person you should try to be better than is the person you were yesterday.
森林是地球的肺，我们必须给予它们应有的关怀。