"I think it's important to have a good sense of purpose. You need to know why you're doing what you're doing."

"I could technically write a book. It might be a little boring."

"I think we're at the dawn of a new age of space exploration."

"I'm not trying to be a superhero. I'm just trying to do what I think is right."

"I don't ever give up. I'd have to be dead or completely incapacitated."