顾客并不知道自己想要什么。
It's not the customer's job to know what they want.
The rule, or measuring rod, which the behaviorist puts in front of him always is: Can I describe this bit of behavior I see in terms of "stimulus and response"?
"History is not the past but a map of the past, drawn from a particular point of view, to be useful to the modern traveller."
"The measure of a good book is determined by how much it disturbs the reader."