目的的概念在行为的科学解释中没有位置。

沙漠不能被声称或拥有——它是一块由风携带的布，从未被石头固定，被赋予了一百个变化的名字。

科学是分类学家的乐园。

学习不以学识渊博为尊贵，贵在能够所学的为正道。

The opening up of new markets, foreign or domestic, and the organizational development from the craft shop and factory to such concerns as U.S. Steel illustrate the same process of industrial mutation—if I may use that biological term—that incessantly revolutionizes the economic structure from within, incessantly destroying the old one, incessantly creating a new one.

"Imagination is more important than knowledge."

教育的回报太遥远，而今天的生计太紧迫。