The study of complex systems has taught us that simple rules can give rise to incredibly complex behavior.
对复杂系统的研究告诉我们，简单的规则可以产生令人难以置信的复杂行为。
People who cannot say no, cannot say yes meaningfully either.
如果你想走得快，独自前行；如果你想走得远，结伴同行。
"The world is full of people who have never, since childhood, met an open doorway with an open mind."