“If you don't learn how to understand the world, then don't be surprised if it fails to understand you.”

“I don't understand it any more than you do, but one thing I've learned is that you don't have to understand things for them to be.”

“If you don't understand yourself you don't understand anybody else.”

“You don't understand anything until you learn it more than one way.”

“Please, you don't want to raise a generation of science students who don't understand how we know our place in the cosmos, who don't understand natural law.”

“I don't understand my feelings. I really don't. I don't understand how I could hate you so much after so much time. How, no matter how much I'd like to not hate you, I hate you even more. It grows.”

“I don't understand you. You don't understand me. What else do we have in common?”

“If you think technology can solve your security problems, then you don't understand the problems and you don't understand the technology.”

“Anything you don't understand is dangerous until you do understand it.”

“I can't relate to lazy people. We don't speak the same language. I don't understand you. I don't want to understand you.”