The right of nature... is the liberty each man hath, to use his own power, as he will himself, for the preservation of his own nature; that is to say, of his own life.

君子容易事奉，但要想讨得他的喜欢则很难。以不正当的方式讨他喜欢，他是不会喜欢的；但他在用人上，却能做到量才使用。小人难以事奉，但要想博得他的欢心则很容易。如果以不正当的手段讨他喜欢，他是会喜欢的；但当他用人时，则会求全责备。

"The only thing that is infinite is the universe and human stupidity."

Innovation in forestry isn't about replacing nature with technology, but using technology to better understand and work with nature.

学习数学的最好方法就是去做数学。