"I'm not a guru. I'm just a guy who loves the universe."

"I don't have a favorite planet. They're all my children."

"The great thing about science is that it doesn't ask for your faith, it just asks for your eyes."

"We don't have enough laws to stop stupid people from doing stupid things."

"If you're not failing, you're not pushing your limits, and if you're not pushing your limits, you're not maximizing your potential."