"I'm not a fan of people who try to cram their beliefs down your throat. I prefer to share information, and let people make up their own minds."

"If you are scientifically literate, the world looks very different to you, and that understanding empowers you."

"I'm not trying to convince you of anything. I'm just trying to get you to think."

"The universe is a hostile place. It wants to kill you. But it's also beautiful, and it's worth fighting for."

"I'm not a guru. I'm just a guy who knows a lot about space."