The true test of a civilization is not the census, nor the size of cities, nor the crops—but the kind of man the country turns out.
文明的真正考验不是人口普查，不是城市的规模，也不是庄稼的产量——而是这个国家培养出什么样的人。
A nation that destroys its soils destroys itself.
世界上充满了神奇的事物，耐心地等待着我们的感官变得更加敏锐。
Liberty means responsibility. That is why most men dread it.
化学最令人兴奋的地方在于能够创造出从未存在过的新分子。
The most important thing in communication is hearing what isn't said.
No matter how complex or refined, all behavior is to be explained in terms of stimulus and response.
无论多么复杂或精细，所有行为都可以用刺激和反应来解释。