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。
The study of complex systems has taught us that simple rules can give rise to incredibly complex behavior.
As in geometry the most natural way of beginning is from a mathematical point, so is the same method in observations and natural history the most genuine, simple, and instructive.
The progress of science consists in the expansion of the field of experience.
生活就是当你忙于制定其他计划时发生的事情。