Psychology must be a science of observation, not speculation.

I think I do myself a disservice by comparing myself to Steve Jobs and Walt Disney and human beings that we've seen before. It should be more like Willy Wonka... and welcome to my chocolate factory.

学习任何事情的最好方法就是去做。

学习数学的最好方法就是去做数学。

看不见的手之所以常常看不见，是因为它常常不存在。