"I'm not a fan of people who say, 'I believe in science.' Science is not a belief system. Science is a method."

"I'm not trying to be controversial. I'm just telling you what the universe is telling us."

"I'm not trying to be the smartest guy in the room. I'm just trying to be the guy who asks the right questions."

"I don't believe in magic. I believe in physics."

"If you want to know what it means to be alive, look at the stars."