Happiness is not something you postpone for the future; it is something you design for the present.
在共和政府中,人人平等;在专制政府中,人人也平等:在前者中,因为他们是一切;在后者中,因为他们什么都不是。
到处卑躬屈膝,可笑你的头为什么有仇于天而又有恩于地而抬不起来?终日谋尽计算,问你的心为什么轻生命而重钱财?
The study of nature is a perpetual joy.
The study of complex systems has taught us that simple rules can give rise to incredibly complex behavior.