The study of mental processes requires both experimental and comparative methods.

"Memory is a strange thing. It doesn't work like I thought it did. We are so used to thinking of it as a camera or a tape recorder, but it's not like that at all. It's more like a painter. It creates a picture, but it's not always the same picture."

经济学家必须贪婪地收集事实；但事实本身并不能说明什么。

I believe in positive thinking and visualization.