“People think that they think things, and they also think that they know things. They could usefully give some attention to the question of whether they know what they think and know what they think they know.”

“What you think you know don’t mean nothin.There is a difference between thinking and knowing. You might think you know something; you might even think you know it pretty well. But there are some things that you can’t ever know without having lived them. Without doing, thinking does not become knowing.”

“To know what people really think, pay attention to what they do, rather than what they say.”

“To a Mormon at the doorstep of a psychologis: I know what you think you think, but I know what you think.”

“Science fiction is very well suited to asking philosophical questions; questions about the nature of reality, what it means to be human, how do we know the things that we think we know.”

“Sometimes, it's like you know what people think: You know what they're thinking, and you know it's wrong. All you want to do if change their mind, but you can't.”