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。
伦理学是对什么是善的一般性探究。
"We are all in the gutter, but some of us are looking at the stars."
The trees are our elders, and they have much to teach us.