"I found myself in a situation where I was giving an answer to a question that I didn't understand, and that alarmed me."

"I have no idea where I'm going. I have no idea where I'm going to be. So it's probably best that I don't know."

"I was brought up to believe that the only way to really understand something is to build it."

"I simply want to find out more about the world, and I find that the best way to do that is to do science."

"You have no responsibility to live up to what other people think you ought to accomplish. I have no responsibility to be like what they expect me to be. It's their mistake, not my failing."