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。
No matter how complex or refined, all behavior is to be explained in terms of stimulus and response.
A book should feel like a friend to a child—comforting, exciting, and full of surprises.
Force and fraud are in war the two cardinal virtues.
A great film is one that leaves you with more questions than answers.
